81337634904 has 16 divisors (see below), whose sum is σ = 203344087320. Its totient is φ = 27112544960.

The previous prime is 81337634849. The next prime is 81337634933. The reversal of 81337634904 is 40943673318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694534037 + ... + 1694534084.

Almost surely, 2^81337634904 is an apocalyptic number.

It is an amenable number.

81337634904 is an abundant number, since it is smaller than the sum of its proper divisors (122006452416).

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

81337634904 is a wasteful number, since it uses less digits than its factorization.

81337634904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389068130 (or 3389068126 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 81337634904 in words is "eighty-one billion, three hundred thirty-seven million, six hundred thirty-four thousand, nine hundred four".