64855313576 has 16 divisors (see below), whose sum is σ = 121606415700. Its totient is φ = 32426936064.

The previous prime is 64855313561. The next prime is 64855313609. The reversal of 64855313576 is 67531355846.

64855313576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61191916900 + 3663396676 = 247370^2 + 60526^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649520 + ... + 742688.

Almost surely, 2^64855313576 is an apocalyptic number.

It is an amenable number.

64855313576 is a deficient number, since it is larger than the sum of its proper divisors (56751102124).

64855313576 is a wasteful number, since it uses less digits than its factorization.

64855313576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180188 (or 180184 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 53.

The spelling of 64855313576 in words is "sixty-four billion, eight hundred fifty-five million, three hundred thirteen thousand, five hundred seventy-six".