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2538954857985 = 357213265720027
BaseRepresentation
bin100100111100100101100…
…000001001111000000001
322222201111010111101101120
4210330211200021320001
5313044234420423420
65222214010022453
7351301445132100
oct44744540117001
98881433441346
102538954857985
11899845910697
12350096a17a29
13155565080370
148ac59542037
154609d99ad40
hex24f25809e01

2538954857985 has 48 divisors (see below), whose sum is σ = 5089069976256. Its totient is φ = 1071383144832.

The previous prime is 2538954857983. The next prime is 2538954857987. The reversal of 2538954857985 is 5897584598352.

It is an interprime number because it is at equal distance from previous prime (2538954857983) and next prime (2538954857987).

It is not a de Polignac number, because 2538954857985 - 21 = 2538954857983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2538954857985.

It is not an unprimeable number, because it can be changed into a prime (2538954857983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132850459 + ... + 132869568.

It is an arithmetic number, because the mean of its divisors is an integer number (106022291172).

Almost surely, 22538954857985 is an apocalyptic number.

It is an amenable number.

2538954857985 is an abundant number, since it is smaller than the sum of its proper divisors (2550115118271).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2538954857985 is a wasteful number, since it uses less digits than its factorization.

2538954857985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265720062 (or 265720055 counting only the distinct ones).

The product of its digits is 4354560000, while the sum is 78.

The spelling of 2538954857985 in words is "two trillion, five hundred thirty-eight billion, nine hundred fifty-four million, eight hundred fifty-seven thousand, nine hundred eighty-five".

Divisors: 1 3 5 7 13 15 21 35 39 49 65 91 105 147 195 245 273 455 637 735 1365 1911 3185 9555 265720027 797160081 1328600135 1860040189 3454360351 3985800405 5580120567 9300200945 10363081053 13020281323 17271801755 24180522457 27900602835 39060843969 51815405265 65101406615 72541567371 120902612285 169263657199 195304219845 362707836855 507790971597 846318285995 2538954857985