13240556631 has 12 divisors (see below), whose sum is σ = 19126277352. Its totient is φ = 8826562896.

The previous prime is 13240556621. The next prime is 13240556647. The reversal of 13240556631 is 13665504231.

13240556631 is a `hidden beast` number, since 1 + 3 + 2 + 40 + 556 + 63 + 1 = 666.

It is not a de Polignac number, because 13240556631 - 2²² = 13236362327 is a prime.

It is a super-2 number, since 2×13240556631² (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 (13240556621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243880 + ... + 293186.

It is an arithmetic number, because the mean of its divisors is an integer number (1593856446).

Almost surely, 2^13240556631 is an apocalyptic number.

13240556631 is a deficient number, since it is larger than the sum of its proper divisors (5885720721).

13240556631 is a wasteful number, since it uses less digits than its factorization.

13240556631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79150 (or 79147 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 13240556631 in words is "thirteen billion, two hundred forty million, five hundred fifty-six thousand, six hundred thirty-one".