172238895780 has 48 divisors (see below), whose sum is σ = 551164467840. Its totient is φ = 39368890368.

The previous prime is 172238895683. The next prime is 172238895793. The reversal of 172238895780 is 87598832271.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205045885 + ... + 205046724.

It is an arithmetic number, because the mean of its divisors is an integer number (11482593080).

Almost surely, 2^172238895780 is an apocalyptic number.

172238895780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172238895780 is an abundant number, since it is smaller than the sum of its proper divisors (378925572060).

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

172238895780 is a wasteful number, since it uses less digits than its factorization.

172238895780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410092628 (or 410092626 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 172238895780 in words is "one hundred seventy-two billion, two hundred thirty-eight million, eight hundred ninety-five thousand, seven hundred eighty".