64464724256 has 48 divisors (see below), whose sum is σ = 136115380800. Its totient is φ = 29959757568.

The previous prime is 64464724241. The next prime is 64464724307. The reversal of 64464724256 is 65242746446.

It is a super-2 number, since 2×64464724256² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968036 + ... + 1032483.

It is an arithmetic number, because the mean of its divisors is an integer number (2835737100).

Almost surely, 2^64464724256 is an apocalyptic number.

It is an amenable number.

64464724256 is an abundant number, since it is smaller than the sum of its proper divisors (71650656544).

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

64464724256 is a wasteful number, since it uses less digits than its factorization.

64464724256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000601 (or 2000593 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 50.

The spelling of 64464724256 in words is "sixty-four billion, four hundred sixty-four million, seven hundred twenty-four thousand, two hundred fifty-six".