6642032537656 has 16 divisors (see below), whose sum is σ = 12509657697600. Its totient is φ = 3306123818304.

The previous prime is 6642032537603. The next prime is 6642032537743. The reversal of 6642032537656 is 6567352302466.

It is a junction number, because it is equal to n+sod(n) for n = 6642032537597 and 6642032537606.

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, 1861554421 + ... + 1861557988.

It is an arithmetic number, because the mean of its divisors is an integer number (781853606100).

Almost surely, 2^{6642032537656} is an apocalyptic number.

It is an amenable number.

6642032537656 is a deficient number, since it is larger than the sum of its proper divisors (5867625159944).

6642032537656 is a wasteful number, since it uses less digits than its factorization.

6642032537656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723112638 (or 3723112634 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 55.

The spelling of 6642032537656 in words is "six trillion, six hundred forty-two billion, thirty-two million, five hundred thirty-seven thousand, six hundred fifty-six".