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25338908780 = 2251266945439
BaseRepresentation
bin10111100110010100…
…010001000001101100
32102101220121221020222
4113212110101001230
5403343230040110
615350204430512
71554631112423
oct274624210154
972356557228
1025338908780
11a823176229
124ab1b48438
13250a808263
1413253a82ba
159d4819c55
hex5e651106c

25338908780 has 12 divisors (see below), whose sum is σ = 53211708480. Its totient is φ = 10135563504.

The previous prime is 25338908761. The next prime is 25338908783. The reversal of 25338908780 is 8780983352.

It is a super-2 number, since 2×253389087802 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25338908783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633472700 + ... + 633472739.

It is an arithmetic number, because the mean of its divisors is an integer number (4434309040).

Almost surely, 225338908780 is an apocalyptic number.

25338908780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25338908780 is an abundant number, since it is smaller than the sum of its proper divisors (27872799700).

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

25338908780 is a wasteful number, since it uses less digits than its factorization.

25338908780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266945448 (or 1266945446 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 25338908780 in words is "twenty-five billion, three hundred thirty-eight million, nine hundred eight thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 20 1266945439 2533890878 5067781756 6334727195 12669454390 25338908780