87931309361 has 16 divisors (see below), whose sum is σ = 104874931200. Its totient is φ = 72083986128.

The previous prime is 87931309357. The next prime is 87931309363. The reversal of 87931309361 is 16390313978.

It is not a de Polignac number, because 87931309361 - 2² = 87931309357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87931309363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520270 + ... + 1577048.

It is an arithmetic number, because the mean of its divisors is an integer number (6554683200).

Almost surely, 2^87931309361 is an apocalyptic number.

It is an amenable number.

87931309361 is a deficient number, since it is larger than the sum of its proper divisors (16943621839).

87931309361 is a wasteful number, since it uses less digits than its factorization.

87931309361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66428.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 87931309361 in words is "eighty-seven billion, nine hundred thirty-one million, three hundred nine thousand, three hundred sixty-one".