12631502261 has 32 divisors (see below), whose sum is σ = 15331099392. Its totient is φ = 10180477440.

The previous prime is 12631502251. The next prime is 12631502287. The reversal of 12631502261 is 16220513621.

It is a de Polignac number, because none of the positive numbers 2^k-12631502261 is a prime.

It is a super-2 number, since 2×12631502261² (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 (12631502201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1130675 + ... + 1141791.

It is an arithmetic number, because the mean of its divisors is an integer number (479096856).

Almost surely, 2^12631502261 is an apocalyptic number.

It is an amenable number.

12631502261 is a deficient number, since it is larger than the sum of its proper divisors (2699597131).

12631502261 is a wasteful number, since it uses less digits than its factorization.

12631502261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11309.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 12631502261 in words is "twelve billion, six hundred thirty-one million, five hundred two thousand, two hundred sixty-one".