172645680 has 80 divisors (see below), whose sum is σ = 536465664. Its totient is φ = 45930240.

The previous prime is 172645673. The next prime is 172645687. The reversal of 172645680 is 86546271.

It is an interprime number because it is at equal distance from previous prime (172645673) and next prime (172645687).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (172645687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194197 + ... + 195083.

Almost surely, 2^172645680 is an apocalyptic number.

172645680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172645680 is an abundant number, since it is smaller than the sum of its proper divisors (363819984).

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

172645680 is a wasteful number, since it uses less digits than its factorization.

172645680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714 (or 1708 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 172645680 is about 13139.4703089584. The cubic root of 172645680 is about 556.8248027827.

The spelling of 172645680 in words is "one hundred seventy-two million, six hundred forty-five thousand, six hundred eighty".