12540632317 has 2 divisors, whose sum is σ = 12540632318. Its totient is φ = 12540632316.

The previous prime is 12540632303. The next prime is 12540632341. The reversal of 12540632317 is 71323604521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8818900281 + 3721732036 = 93909^2 + 61006^2 .

It is a cyclic number.

It is not a de Polignac number, because 12540632317 - 2¹¹ = 12540630269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12540630317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270316158 + 6270316159.

It is an arithmetic number, because the mean of its divisors is an integer number (6270316159).

Almost surely, 2^12540632317 is an apocalyptic number.

It is an amenable number.

12540632317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540632317 is an equidigital number, since it uses as much as digits as its factorization.

12540632317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 12540632317 in words is "twelve billion, five hundred forty million, six hundred thirty-two thousand, three hundred seventeen".