12887791639 has 2 divisors, whose sum is σ = 12887791640. Its totient is φ = 12887791638.

The previous prime is 12887791601. The next prime is 12887791667. The reversal of 12887791639 is 93619778821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12887791639 - 2⁹ = 12887791127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12887791039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6443895819 + 6443895820.

It is an arithmetic number, because the mean of its divisors is an integer number (6443895820).

Almost surely, 2^12887791639 is an apocalyptic number.

12887791639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12887791639 is an equidigital number, since it uses as much as digits as its factorization.

12887791639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 61.

The spelling of 12887791639 in words is "twelve billion, eight hundred eighty-seven million, seven hundred ninety-one thousand, six hundred thirty-nine".