12540636331 has 2 divisors, whose sum is σ = 12540636332. Its totient is φ = 12540636330.

The previous prime is 12540636307. The next prime is 12540636391. The reversal of 12540636331 is 13363604521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12540636331 - 2⁷ = 12540636203 is a prime.

It is a super-2 number, since 2×12540636331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12540636301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270318165 + 6270318166.

It is an arithmetic number, because the mean of its divisors is an integer number (6270318166).

Almost surely, 2^12540636331 is an apocalyptic number.

12540636331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540636331 is an equidigital number, since it uses as much as digits as its factorization.

12540636331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 12540636331 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, three hundred thirty-one".