64492564256 has 12 divisors (see below), whose sum is σ = 126969735942. Its totient is φ = 32246282112.

The previous prime is 64492564247. The next prime is 64492564271. The reversal of 64492564256 is 65246529446.

It can be written as a sum of positive squares in only one way, i.e., 53030720656 + 11461843600 = 230284^2 + 107060^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64492564198 and 64492564207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007696285 + ... + 1007696348.

Almost surely, 2^64492564256 is an apocalyptic number.

It is an amenable number.

64492564256 is a deficient number, since it is larger than the sum of its proper divisors (62477171686).

64492564256 is a wasteful number, since it uses less digits than its factorization.

64492564256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015392643 (or 2015392635 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 64492564256 in words is "sixty-four billion, four hundred ninety-two million, five hundred sixty-four thousand, two hundred fifty-six".