131440165591 has 12 divisors (see below), whose sum is σ = 156455595912. Its totient is φ = 110042927568.

The previous prime is 131440165553. The next prime is 131440165601. The reversal of 131440165591 is 195561044131.

It is not a de Polignac number, because 131440165591 - 2¹⁷ = 131440034519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440162591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31189200 + ... + 31193413.

It is an arithmetic number, because the mean of its divisors is an integer number (13037966326).

Almost surely, 2^131440165591 is an apocalyptic number.

131440165591 is a deficient number, since it is larger than the sum of its proper divisors (25015430321).

131440165591 is an equidigital number, since it uses as much as digits as its factorization.

131440165591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62382670 (or 62382663 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 131440165591 in words is "one hundred thirty-one billion, four hundred forty million, one hundred sixty-five thousand, five hundred ninety-one".