81038507860104 has 64 divisors (see below), whose sum is σ = 215655402456000. Its totient is φ = 25303567196160.

The previous prime is 81038507860099. The next prime is 81038507860127. The reversal of 81038507860104 is 40106870583018.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998364057 + ... + 998445224.

It is an arithmetic number, because the mean of its divisors is an integer number (3369615663375).

Almost surely, 2^{81038507860104} is an apocalyptic number.

It is an amenable number.

81038507860104 is an abundant number, since it is smaller than the sum of its proper divisors (134616894595896).

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

81038507860104 is a wasteful number, since it uses less digits than its factorization.

81038507860104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996809398 (or 1996809394 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 81038507860104 in words is "eighty-one trillion, thirty-eight billion, five hundred seven million, eight hundred sixty thousand, one hundred four".