64136642572 has 6 divisors (see below), whose sum is σ = 112239124508. Its totient is φ = 32068321284.

The previous prime is 64136642569. The next prime is 64136642593. The reversal of 64136642572 is 27524663146.

64136642572 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 2×64136642572² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8017080318 + ... + 8017080325.

Almost surely, 2^64136642572 is an apocalyptic number.

It is an amenable number.

64136642572 is a deficient number, since it is larger than the sum of its proper divisors (48102481936).

64136642572 is a wasteful number, since it uses less digits than its factorization.

64136642572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16034160647 (or 16034160645 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 46.

The spelling of 64136642572 in words is "sixty-four billion, one hundred thirty-six million, six hundred forty-two thousand, five hundred seventy-two".