64831974858 has 32 divisors (see below), whose sum is σ = 164652635520. Its totient is φ = 18523421280.

The previous prime is 64831974833. The next prime is 64831974901. The reversal of 64831974858 is 85847913846.

64831974858 is a `hidden beast` number, since 6 + 483 + 1 + 9 + 74 + 85 + 8 = 666.

64831974858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 64831974795 and 64831974804.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85756203 + ... + 85756958.

It is an arithmetic number, because the mean of its divisors is an integer number (5145394860).

Almost surely, 2^64831974858 is an apocalyptic number.

64831974858 is an abundant number, since it is smaller than the sum of its proper divisors (99820660662).

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

64831974858 is a wasteful number, since it uses less digits than its factorization.

64831974858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171513179 (or 171513173 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 64831974858 in words is "sixty-four billion, eight hundred thirty-one million, nine hundred seventy-four thousand, eight hundred fifty-eight".