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64718241249 = 3413791388297
BaseRepresentation
bin111100010001100000…
…011111110111100001
320012001022210021222010
4330101200133313201
52030020332204444
645421532303133
74450530655044
oct742140376741
9205038707863
1064718241249
11254a083a5a2
1210662011aa9
136145106a0c
1431bd36cc5b
151a3baa02b9
hexf1181fde1

64718241249 has 16 divisors (see below), whose sum is σ = 88628944320. Its totient is φ = 41982071040.

The previous prime is 64718241221. The next prime is 64718241253. The reversal of 64718241249 is 94214281746.

It is not a de Polignac number, because 64718241249 - 29 = 64718240737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64718241198 and 64718241207.

It is not an unprimeable number, because it can be changed into a prime (64718241449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647532 + ... + 740765.

It is an arithmetic number, because the mean of its divisors is an integer number (5539309020).

Almost surely, 264718241249 is an apocalyptic number.

It is an amenable number.

64718241249 is a deficient number, since it is larger than the sum of its proper divisors (23910703071).

64718241249 is a wasteful number, since it uses less digits than its factorization.

64718241249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388720.

The product of its digits is 774144, while the sum is 48.

The spelling of 64718241249 in words is "sixty-four billion, seven hundred eighteen million, two hundred forty-one thousand, two hundred forty-nine".

Divisors: 1 3 41 123 379 1137 15539 46617 1388297 4164891 56920177 170760531 526164563 1578493689 21572747083 64718241249