13631604634 has 4 divisors (see below), whose sum is σ = 20447406954. Its totient is φ = 6815802316.

The previous prime is 13631604619. The next prime is 13631604799. The reversal of 13631604634 is 43640613631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43640613631 = 11551 ⋅3778081.

It can be written as a sum of positive squares in only one way, i.e., 12122670609 + 1508934025 = 110103^2 + 38845^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13631604593 and 13631604602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407901157 + ... + 3407901160.

Almost surely, 2^13631604634 is an apocalyptic number.

13631604634 is a deficient number, since it is larger than the sum of its proper divisors (6815802320).

13631604634 is an equidigital number, since it uses as much as digits as its factorization.

13631604634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815802319.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 13631604634 in words is "thirteen billion, six hundred thirty-one million, six hundred four thousand, six hundred thirty-four".