64620684624 has 40 divisors (see below), whose sum is σ = 168496938720. Its totient is φ = 21338915968.

The previous prime is 64620684607. The next prime is 64620684629. The reversal of 64620684624 is 42648602646.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620684629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6285819 + ... + 6296090.

It is an arithmetic number, because the mean of its divisors is an integer number (4212423468).

Almost surely, 2^64620684624 is an apocalyptic number.

It is an amenable number.

64620684624 is an abundant number, since it is smaller than the sum of its proper divisors (103876254096).

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

64620684624 is a wasteful number, since it uses less digits than its factorization.

64620684624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12582027 (or 12582021 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 64620684624 in words is "sixty-four billion, six hundred twenty million, six hundred eighty-four thousand, six hundred twenty-four".