172655056 has 40 divisors (see below), whose sum is σ = 386118144. Its totient is φ = 73257600.

The previous prime is 172655039. The next prime is 172655069. The reversal of 172655056 is 650556271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3681 + ... + 18943.

Almost surely, 2^172655056 is an apocalyptic number.

172655056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172655056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193059072).

172655056 is an abundant number, since it is smaller than the sum of its proper divisors (213463088).

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

172655056 is a wasteful number, since it uses less digits than its factorization.

172655056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15379 (or 15373 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 172655056 is about 13139.8270917086. The cubic root of 172655056 is about 556.8348825693.

The spelling of 172655056 in words is "one hundred seventy-two million, six hundred fifty-five thousand, fifty-six".