172134642220 has 12 divisors (see below), whose sum is σ = 361482748704. Its totient is φ = 68853856880.

The previous prime is 172134642149. The next prime is 172134642227. The reversal of 172134642220 is 22246431271.

172134642220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172134642227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4303366036 + ... + 4303366075.

It is an arithmetic number, because the mean of its divisors is an integer number (30123562392).

Almost surely, 2^172134642220 is an apocalyptic number.

172134642220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172134642220 is an abundant number, since it is smaller than the sum of its proper divisors (189348106484).

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

172134642220 is a wasteful number, since it uses less digits than its factorization.

172134642220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606732120 (or 8606732118 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 172134642220 in words is "one hundred seventy-two billion, one hundred thirty-four million, six hundred forty-two thousand, two hundred twenty".