13604440631 has 2 divisors, whose sum is σ = 13604440632. Its totient is φ = 13604440630.

The previous prime is 13604440579. The next prime is 13604440639.

13604440631 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 13604440631 - 2¹⁴ = 13604424247 is a prime.

It is a super-2 number, since 2×13604440631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13604440639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6802220315 + 6802220316.

It is an arithmetic number, because the mean of its divisors is an integer number (6802220316).

Almost surely, 2^13604440631 is an apocalyptic number.

13604440631 is a deficient number, since it is larger than the sum of its proper divisors (1).

13604440631 is an equidigital number, since it uses as much as digits as its factorization.

13604440631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 13604440631 in words is "thirteen billion, six hundred four million, four hundred forty thousand, six hundred thirty-one".