172238895779 has 16 divisors (see below), whose sum is σ = 185638003200. Its totient is φ = 159291044064.

The previous prime is 172238895683. The next prime is 172238895793. The reversal of 172238895779 is 977598832271.

172238895779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 172238895779 - 2²⁰ = 172237847203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172238885779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99464 + ... + 595290.

It is an arithmetic number, because the mean of its divisors is an integer number (11602375200).

Almost surely, 2^172238895779 is an apocalyptic number.

172238895779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

172238895779 is a deficient number, since it is larger than the sum of its proper divisors (13399107421).

172238895779 is a wasteful number, since it uses less digits than its factorization.

172238895779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496282.

The product of its digits is 106686720, while the sum is 68.

The spelling of 172238895779 in words is "one hundred seventy-two billion, two hundred thirty-eight million, eight hundred ninety-five thousand, seven hundred seventy-nine".