81038097660990 has 16 divisors (see below), whose sum is σ = 194491434386448. Its totient is φ = 21610159376256.

The previous prime is 81038097660979. The next prime is 81038097661009. The reversal of 81038097660990 is 9906679083018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350634960987 + ... + 1350634961046.

It is an arithmetic number, because the mean of its divisors is an integer number (12155714649153).

Almost surely, 2^{81038097660990} is an apocalyptic number.

81038097660990 is an abundant number, since it is smaller than the sum of its proper divisors (113453336725458).

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

81038097660990 is a wasteful number, since it uses less digits than its factorization.

81038097660990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701269922043.

The product of its (nonzero) digits is 35271936, while the sum is 66.

The spelling of 81038097660990 in words is "eighty-one trillion, thirty-eight billion, ninety-seven million, six hundred sixty thousand, nine hundred ninety".