12640279999 has 2 divisors, whose sum is σ = 12640280000. Its totient is φ = 12640279998.

The previous prime is 12640279973. The next prime is 12640280017. The reversal of 12640279999 is 99997204621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12640279999 - 2¹³ = 12640271807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12640271999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320139999 + 6320140000.

It is an arithmetic number, because the mean of its divisors is an integer number (6320140000).

Almost surely, 2^12640279999 is an apocalyptic number.

12640279999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640279999 is an equidigital number, since it uses as much as digits as its factorization.

12640279999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 12640279999 in words is "twelve billion, six hundred forty million, two hundred seventy-nine thousand, nine hundred ninety-nine".