2639012791 has 2 divisors, whose sum is σ = 2639012792. Its totient is φ = 2639012790.

The previous prime is 2639012777. The next prime is 2639012807. The reversal of 2639012791 is 1972109362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2639012791 - 2⁹ = 2639012279 is a prime.

It is a super-2 number, since 2×2639012791² = 13928777022123219362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2639012741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319506395 + 1319506396.

It is an arithmetic number, because the mean of its divisors is an integer number (1319506396).

Almost surely, 2^2639012791 is an apocalyptic number.

2639012791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639012791 is an equidigital number, since it uses as much as digits as its factorization.

2639012791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 2639012791 is about 51371.3226518454. The cubic root of 2639012791 is about 1381.9123509888.

The spelling of 2639012791 in words is "two billion, six hundred thirty-nine million, twelve thousand, seven hundred ninety-one".