115666025531 has 16 divisors (see below), whose sum is σ = 136770259200. Its totient is φ = 95708033568.

The previous prime is 115666025479. The next prime is 115666025557. The reversal of 115666025531 is 135520666511.

It is a de Polignac number, because none of the positive numbers 2^k-115666025531 is a prime.

It is a super-2 number, since 2×115666025531² (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 (115666075531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1300616 + ... + 1386698.

It is an arithmetic number, because the mean of its divisors is an integer number (8548141200).

Almost surely, 2^115666025531 is an apocalyptic number.

115666025531 is a deficient number, since it is larger than the sum of its proper divisors (21104233669).

115666025531 is an equidigital number, since it uses as much as digits as its factorization.

115666025531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92738.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 115666025531 in words is "one hundred fifteen billion, six hundred sixty-six million, twenty-five thousand, five hundred thirty-one".