13621412631 has 4 divisors (see below), whose sum is σ = 18161883512. Its totient is φ = 9080941752.

The previous prime is 13621412603. The next prime is 13621412633.

13621412631 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13621412631 - 2²² = 13617218327 is a prime.

It is a super-2 number, since 2×13621412631² (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 (13621412633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270235436 + ... + 2270235441.

It is an arithmetic number, because the mean of its divisors is an integer number (4540470878).

Almost surely, 2^13621412631 is an apocalyptic number.

13621412631 is a deficient number, since it is larger than the sum of its proper divisors (4540470881).

13621412631 is an equidigital number, since it uses as much as digits as its factorization.

13621412631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540470880.

The product of its digits is 5184, while the sum is 30.

The spelling of 13621412631 in words is "thirteen billion, six hundred twenty-one million, four hundred twelve thousand, six hundred thirty-one".