131099040720 has 120 divisors (see below), whose sum is σ = 441948963456. Its totient is φ = 34826767104.

The previous prime is 131099040629. The next prime is 131099040731. The reversal of 131099040720 is 27040990131.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156804 + ... + 535523.

Almost surely, 2^131099040720 is an apocalyptic number.

131099040720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131099040720 is an abundant number, since it is smaller than the sum of its proper divisors (310849922736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131099040720 is a wasteful number, since it uses less digits than its factorization.

131099040720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692609 (or 692600 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 131099040720 in words is "one hundred thirty-one billion, ninety-nine million, forty thousand, seven hundred twenty".