86790221538 has 16 divisors (see below), whose sum is σ = 173706883776. Its totient is φ = 28909000400.

The previous prime is 86790221509. The next prime is 86790221549. The reversal of 86790221538 is 83512209768.

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, 5259438 + ... + 5275913.

It is an arithmetic number, because the mean of its divisors is an integer number (10856680236).

Almost surely, 2^86790221538 is an apocalyptic number.

86790221538 is an abundant number, since it is smaller than the sum of its proper divisors (86916662238).

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

86790221538 is a wasteful number, since it uses less digits than its factorization.

86790221538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536729.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 86790221538 in words is "eighty-six billion, seven hundred ninety million, two hundred twenty-one thousand, five hundred thirty-eight".