811156913239 has 2 divisors, whose sum is σ = 811156913240. Its totient is φ = 811156913238.

The previous prime is 811156913213. The next prime is 811156913321. The reversal of 811156913239 is 932319651118.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811156913239 - 2²⁹ = 810620042327 is a prime.

It is a super-2 number, since 2×811156913239² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811156913192 and 811156913201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811156913839) 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, 405578456619 + 405578456620.

It is an arithmetic number, because the mean of its divisors is an integer number (405578456620).

Almost surely, 2^811156913239 is an apocalyptic number.

811156913239 is a deficient number, since it is larger than the sum of its proper divisors (1).

811156913239 is an equidigital number, since it uses as much as digits as its factorization.

811156913239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 49.

The spelling of 811156913239 in words is "eight hundred eleven billion, one hundred fifty-six million, nine hundred thirteen thousand, two hundred thirty-nine".