82921515638 has 32 divisors (see below), whose sum is σ = 141855706944. Its totient is φ = 36013565952.

The previous prime is 82921515623. The next prime is 82921515659. The reversal of 82921515638 is 83651512928.

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 15 ways as a sum of consecutive naturals, for example, 2963831 + ... + 2991677.

It is an arithmetic number, because the mean of its divisors is an integer number (4432990842).

Almost surely, 2^82921515638 is an apocalyptic number.

82921515638 is a deficient number, since it is larger than the sum of its proper divisors (58934191306).

82921515638 is a wasteful number, since it uses less digits than its factorization.

82921515638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34616.

The product of its digits is 1036800, while the sum is 50.

The spelling of 82921515638 in words is "eighty-two billion, nine hundred twenty-one million, five hundred fifteen thousand, six hundred thirty-eight".