2161632311631 has 12 divisors (see below), whose sum is σ = 3362539151608. Its totient is φ = 1330235268624.

The previous prime is 2161632311623. The next prime is 2161632311731. The reversal of 2161632311631 is 1361132361612.

2161632311631 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 6 + 3 + 2 + 3 + 11 + 631 = 666.

It is not a de Polignac number, because 2161632311631 - 2³ = 2161632311623 is a prime.

It is a super-3 number, since 3×2161632311631³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161632311611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9237744805 + ... + 9237745038.

Almost surely, 2^{2161632311631} is an apocalyptic number.

2161632311631 is a deficient number, since it is larger than the sum of its proper divisors (1200906839977).

2161632311631 is a wasteful number, since it uses less digits than its factorization.

2161632311631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18475489862 (or 18475489859 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The spelling of 2161632311631 in words is "two trillion, one hundred sixty-one billion, six hundred thirty-two million, three hundred eleven thousand, six hundred thirty-one".