13616261631 has 24 divisors (see below), whose sum is σ = 23660673920. Its totient is φ = 7371208656.

The previous prime is 13616261629. The next prime is 13616261647.

13616261631 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 6 + 2 + 616 + 31 = 666.

13616261631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13616261631 - 2¹ = 13616261629 is a prime.

It is a super-2 number, since 2×13616261631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13616261611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5686465 + ... + 5688858.

Almost surely, 2^13616261631 is an apocalyptic number.

13616261631 is a deficient number, since it is larger than the sum of its proper divisors (10044412289).

13616261631 is a wasteful number, since it uses less digits than its factorization.

13616261631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375355 (or 11375352 counting only the distinct ones).

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

The spelling of 13616261631 in words is "thirteen billion, six hundred sixteen million, two hundred sixty-one thousand, six hundred thirty-one".