12640263607 has 2 divisors, whose sum is σ = 12640263608. Its totient is φ = 12640263606.

The previous prime is 12640263599. The next prime is 12640263619. The reversal of 12640263607 is 70636204621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12640263607 - 2³ = 12640263599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12640263007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320131803 + 6320131804.

It is an arithmetic number, because the mean of its divisors is an integer number (6320131804).

Almost surely, 2^12640263607 is an apocalyptic number.

12640263607 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640263607 is an equidigital number, since it uses as much as digits as its factorization.

12640263607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 12640263607 in words is "twelve billion, six hundred forty million, two hundred sixty-three thousand, six hundred seven".