811156913839 has 2 divisors, whose sum is σ = 811156913840. Its totient is φ = 811156913838.

The previous prime is 811156913813. The next prime is 811156913887. The reversal of 811156913839 is 938319651118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811156913839 - 2⁵ = 811156913807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 811156913839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811156913239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405578456919 + 405578456920.

It is an arithmetic number, because the mean of its divisors is an integer number (405578456920).

Almost surely, 2^811156913839 is an apocalyptic number.

811156913839 is a deficient number, since it is larger than the sum of its proper divisors (1).

811156913839 is an equidigital number, since it uses as much as digits as its factorization.

811156913839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 55.

The spelling of 811156913839 in words is "eight hundred eleven billion, one hundred fifty-six million, nine hundred thirteen thousand, eight hundred thirty-nine".