172992090791 has 18 divisors (see below), whose sum is σ = 190011188232. Its totient is φ = 157394459040.

The previous prime is 172992090743. The next prime is 172992090847. The reversal of 172992090791 is 197090299271.

It is a de Polignac number, because none of the positive numbers 2^k-172992090791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172992090191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45558305 + ... + 45562101.

It is an arithmetic number, because the mean of its divisors is an integer number (10556177124).

Almost surely, 2^172992090791 is an apocalyptic number.

172992090791 is a deficient number, since it is larger than the sum of its proper divisors (17019097441).

172992090791 is an frugal number, since it uses more digits than its factorization.

172992090791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691 (or 3881 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 56.

The spelling of 172992090791 in words is "one hundred seventy-two billion, nine hundred ninety-two million, ninety thousand, seven hundred ninety-one".