11566172831 has 2 divisors, whose sum is σ = 11566172832. Its totient is φ = 11566172830.

The previous prime is 11566172741. The next prime is 11566172837. The reversal of 11566172831 is 13827166511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11566172831 - 2¹⁰ = 11566171807 is a prime.

It is a super-2 number, since 2×11566172831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11566172837) 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, 5783086415 + 5783086416.

It is an arithmetic number, because the mean of its divisors is an integer number (5783086416).

Almost surely, 2^11566172831 is an apocalyptic number.

11566172831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566172831 is an equidigital number, since it uses as much as digits as its factorization.

11566172831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The spelling of 11566172831 in words is "eleven billion, five hundred sixty-six million, one hundred seventy-two thousand, eight hundred thirty-one".