87931216475 has 6 divisors (see below), whose sum is σ = 109034708460. Its totient is φ = 70344973160.

The previous prime is 87931216463. The next prime is 87931216523. The reversal of 87931216475 is 57461213978.

It is a de Polignac number, because none of the positive numbers 2^k-87931216475 is a prime.

It is a super-2 number, since 2×87931216475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1758624305 + ... + 1758624354.

It is an arithmetic number, because the mean of its divisors is an integer number (18172451410).

Almost surely, 2^87931216475 is an apocalyptic number.

87931216475 is a deficient number, since it is larger than the sum of its proper divisors (21103491985).

87931216475 is a wasteful number, since it uses less digits than its factorization.

87931216475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517248669 (or 3517248664 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The spelling of 87931216475 in words is "eighty-seven billion, nine hundred thirty-one million, two hundred sixteen thousand, four hundred seventy-five".