31516622661 has 16 divisors (see below), whose sum is σ = 42763636224. Its totient is φ = 20642586624.

The previous prime is 31516622611. The next prime is 31516622693. The reversal of 31516622661 is 16622661513.

It is not a de Polignac number, because 31516622661 - 2¹⁰ = 31516621637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31516622611) 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, 223701 + ... + 336266.

It is an arithmetic number, because the mean of its divisors is an integer number (2672727264).

Almost surely, 2^31516622661 is an apocalyptic number.

It is an amenable number.

31516622661 is a deficient number, since it is larger than the sum of its proper divisors (11247013563).

31516622661 is a wasteful number, since it uses less digits than its factorization.

31516622661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560300.

The product of its digits is 77760, while the sum is 39.

The spelling of 31516622661 in words is "thirty-one billion, five hundred sixteen million, six hundred twenty-two thousand, six hundred sixty-one".