64616257056 has 48 divisors (see below), whose sum is σ = 182665191744. Its totient is φ = 19881924864.

The previous prime is 64616257031. The next prime is 64616257091. The reversal of 64616257056 is 65075261646.

64616257056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 64616256996 and 64616257014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25886676 + ... + 25889171.

It is an arithmetic number, because the mean of its divisors is an integer number (3805524828).

Almost surely, 2^64616257056 is an apocalyptic number.

It is an amenable number.

64616257056 is an abundant number, since it is smaller than the sum of its proper divisors (118048934688).

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

64616257056 is a wasteful number, since it uses less digits than its factorization.

64616257056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51775873 (or 51775865 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 64616257056 in words is "sixty-four billion, six hundred sixteen million, two hundred fifty-seven thousand, fifty-six".