64636685676 has 72 divisors (see below), whose sum is σ = 164541319488. Its totient is φ = 21393900000.

The previous prime is 64636685669. The next prime is 64636685681. The reversal of 64636685676 is 67658663646.

It is a happy number.

64636685676 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 6 + 68 + 567 + 6 = 666.

64636685676 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64636685676² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2980111 + ... + 3001721.

It is an arithmetic number, because the mean of its divisors is an integer number (2285296104).

Almost surely, 2^64636685676 is an apocalyptic number.

It is an amenable number.

64636685676 is an abundant number, since it is smaller than the sum of its proper divisors (99904633812).

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

64636685676 is a wasteful number, since it uses less digits than its factorization.

64636685676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22203 (or 22198 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 63.

The spelling of 64636685676 in words is "sixty-four billion, six hundred thirty-six million, six hundred eighty-five thousand, six hundred seventy-six".