12640290907 has 2 divisors, whose sum is σ = 12640290908. Its totient is φ = 12640290906.

The previous prime is 12640290847. The next prime is 12640290917. The reversal of 12640290907 is 70909204621.

It is a strong prime.

It is an emirp because it is prime and its reverse (70909204621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12640290907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12640290907.

It is not a weakly prime, because it can be changed into another prime (12640290917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320145453 + 6320145454.

It is an arithmetic number, because the mean of its divisors is an integer number (6320145454).

Almost surely, 2^12640290907 is an apocalyptic number.

12640290907 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640290907 is an equidigital number, since it uses as much as digits as its factorization.

12640290907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 12640290907 in words is "twelve billion, six hundred forty million, two hundred ninety thousand, nine hundred seven".