172020550680 has 96 divisors (see below), whose sum is σ = 609891057360. Its totient is φ = 41701950720.

The previous prime is 172020550661. The next prime is 172020550693. The reversal of 172020550680 is 86055020271.

It is a happy number.

172020550680 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 20 + 550 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21715807 + ... + 21723726.

Almost surely, 2^172020550680 is an apocalyptic number.

172020550680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172020550680 is an abundant number, since it is smaller than the sum of its proper divisors (437870506680).

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

172020550680 is a wasteful number, since it uses less digits than its factorization.

172020550680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43439561 (or 43439554 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 172020550680 in words is "one hundred seventy-two billion, twenty million, five hundred fifty thousand, six hundred eighty".