115666979131 has 16 divisors (see below), whose sum is σ = 127623444480. Its totient is φ = 103951165120.

The previous prime is 115666979123. The next prime is 115666979137. The reversal of 115666979131 is 131979666511.

It is not a de Polignac number, because 115666979131 - 2³ = 115666979123 is a prime.

It is a super-2 number, since 2×115666979131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115666979137) 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 in 15 ways as a sum of consecutive naturals, for example, 10120086 + ... + 10131508.

It is an arithmetic number, because the mean of its divisors is an integer number (7976465280).

Almost surely, 2^115666979131 is an apocalyptic number.

115666979131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115666979131 is a deficient number, since it is larger than the sum of its proper divisors (11956465349).

115666979131 is a wasteful number, since it uses less digits than its factorization.

115666979131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866.

The product of its digits is 1837080, while the sum is 55.

The spelling of 115666979131 in words is "one hundred fifteen billion, six hundred sixty-six million, nine hundred seventy-nine thousand, one hundred thirty-one".