13616451631 has 16 divisors (see below), whose sum is σ = 15202740960. Its totient is φ = 12119777280.

The previous prime is 13616451623. The next prime is 13616451661. The reversal of 13616451631 is 13615461631.

13616451631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13616451631 - 2³ = 13616451623 is a prime.

It is a super-2 number, since 2×13616451631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13616451601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149841 + ... + 222901.

It is an arithmetic number, because the mean of its divisors is an integer number (950171310).

Almost surely, 2^13616451631 is an apocalyptic number.

13616451631 is a deficient number, since it is larger than the sum of its proper divisors (1586289329).

13616451631 is a wasteful number, since it uses less digits than its factorization.

13616451631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73674.

The product of its digits is 38880, while the sum is 37.

The spelling of 13616451631 in words is "thirteen billion, six hundred sixteen million, four hundred fifty-one thousand, six hundred thirty-one".