12640276511 has 2 divisors, whose sum is σ = 12640276512. Its totient is φ = 12640276510.

The previous prime is 12640276483. The next prime is 12640276549. The reversal of 12640276511 is 11567204621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12640276511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12640276211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320138255 + 6320138256.

It is an arithmetic number, because the mean of its divisors is an integer number (6320138256).

Almost surely, 2^12640276511 is an apocalyptic number.

12640276511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640276511 is an equidigital number, since it uses as much as digits as its factorization.

12640276511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 12640276511 in words is "twelve billion, six hundred forty million, two hundred seventy-six thousand, five hundred eleven".