64642513372 has 12 divisors (see below), whose sum is σ = 116181814840. Its totient is φ = 31447709136.

The previous prime is 64642513361. The next prime is 64642513381. The reversal of 64642513372 is 27331524646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218386722 + ... + 218387017.

Almost surely, 2^64642513372 is an apocalyptic number.

It is an amenable number.

64642513372 is a deficient number, since it is larger than the sum of its proper divisors (51539301468).

64642513372 is a wasteful number, since it uses less digits than its factorization.

64642513372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436773780 (or 436773778 counting only the distinct ones).

The product of its digits is 725760, while the sum is 43.

The spelling of 64642513372 in words is "sixty-four billion, six hundred forty-two million, five hundred thirteen thousand, three hundred seventy-two".