172808372499 has 16 divisors (see below), whose sum is σ = 271821465600. Its totient is φ = 95562233280.

The previous prime is 172808372491. The next prime is 172808372509. The reversal of 172808372499 is 994273808271.

It is not a de Polignac number, because 172808372499 - 2³ = 172808372491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172808372491) 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, 132724674 + ... + 132725975.

It is an arithmetic number, because the mean of its divisors is an integer number (16988841600).

Almost surely, 2^172808372499 is an apocalyptic number.

172808372499 is a deficient number, since it is larger than the sum of its proper divisors (99013093101).

172808372499 is a wasteful number, since it uses less digits than its factorization.

172808372499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265450690.

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 172808372499 in words is "one hundred seventy-two billion, eight hundred eight million, three hundred seventy-two thousand, four hundred ninety-nine".