81017073804 has 24 divisors (see below), whose sum is σ = 198989304640. Its totient is φ = 25584339024.

The previous prime is 81017073773. The next prime is 81017073821. The reversal of 81017073804 is 40837071018.

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, 177668794 + ... + 177669249.

Almost surely, 2^81017073804 is an apocalyptic number.

It is an amenable number.

81017073804 is an abundant number, since it is smaller than the sum of its proper divisors (117972230836).

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

81017073804 is a wasteful number, since it uses less digits than its factorization.

81017073804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355338069 (or 355338067 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 81017073804 in words is "eighty-one billion, seventeen million, seventy-three thousand, eight hundred four".