11556332831 has 2 divisors, whose sum is σ = 11556332832. Its totient is φ = 11556332830.

The previous prime is 11556332813. The next prime is 11556332833. The reversal of 11556332831 is 13823365511.

Together with previous prime (11556332813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11556332831 - 2²² = 11552138527 is a prime.

It is a super-2 number, since 2×11556332831² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 11556332833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11556332833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778166415 + 5778166416.

It is an arithmetic number, because the mean of its divisors is an integer number (5778166416).

Almost surely, 2^11556332831 is an apocalyptic number.

11556332831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556332831 is an equidigital number, since it uses as much as digits as its factorization.

11556332831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The spelling of 11556332831 in words is "eleven billion, five hundred fifty-six million, three hundred thirty-two thousand, eight hundred thirty-one".