56673956638 has 16 divisors (see below), whose sum is σ = 91555354800. Its totient is φ = 26155748736.

The previous prime is 56673956627. The next prime is 56673956653. The reversal of 56673956638 is 83665937665.

It is a super-2 number, since 2×56673956638² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56673956638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516438 + ... + 616486.

It is an arithmetic number, because the mean of its divisors is an integer number (5722209675).

Almost surely, 2^56673956638 is an apocalyptic number.

56673956638 is a deficient number, since it is larger than the sum of its proper divisors (34881398162).

56673956638 is a wasteful number, since it uses less digits than its factorization.

56673956638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121851.

The product of its digits is 146966400, while the sum is 64.

The spelling of 56673956638 in words is "fifty-six billion, six hundred seventy-three million, nine hundred fifty-six thousand, six hundred thirty-eight".