6638837975572 has 24 divisors (see below), whose sum is σ = 13419683182080. Its totient is φ = 2840144588160.

The previous prime is 6638837975501. The next prime is 6638837975593. The reversal of 6638837975572 is 2755797388366.

It is a congruent number.

It is an unprimeable number.

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, 4437725172 + ... + 4437726667.

It is an arithmetic number, because the mean of its divisors is an integer number (559153465920).

Almost surely, 2^{6638837975572} is an apocalyptic number.

It is an amenable number.

6638837975572 is an abundant number, since it is smaller than the sum of its proper divisors (6780845206508).

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

6638837975572 is a wasteful number, since it uses less digits than its factorization.

6638837975572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8875451871 (or 8875451869 counting only the distinct ones).

The product of its digits is 3200601600, while the sum is 76.

The spelling of 6638837975572 in words is "six trillion, six hundred thirty-eight billion, eight hundred thirty-seven million, nine hundred seventy-five thousand, five hundred seventy-two".