172728874160 has 20 divisors (see below), whose sum is σ = 401594632608. Its totient is φ = 69091549632.

The previous prime is 172728874147. The next prime is 172728874181. The reversal of 172728874160 is 61478827271.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×172728874160² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079555384 + ... + 1079555543.

Almost surely, 2^172728874160 is an apocalyptic number.

172728874160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172728874160 is an abundant number, since it is smaller than the sum of its proper divisors (228865758448).

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

172728874160 is a wasteful number, since it uses less digits than its factorization.

172728874160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159110940 (or 2159110934 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 172728874160 in words is "one hundred seventy-two billion, seven hundred twenty-eight million, eight hundred seventy-four thousand, one hundred sixty".