172855292920 has 16 divisors (see below), whose sum is σ = 388924409160. Its totient is φ = 69142117152.

The previous prime is 172855292899. The next prime is 172855292923. The reversal of 172855292920 is 29292558271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172855292923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160691122 + ... + 2160691201.

Almost surely, 2^172855292920 is an apocalyptic number.

172855292920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172855292920 is an abundant number, since it is smaller than the sum of its proper divisors (216069116240).

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

172855292920 is a wasteful number, since it uses less digits than its factorization.

172855292920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321382334 (or 4321382330 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 172855292920 in words is "one hundred seventy-two billion, eight hundred fifty-five million, two hundred ninety-two thousand, nine hundred twenty".