172867615980 has 48 divisors (see below), whose sum is σ = 484193732064. Its totient is φ = 46082373120.

The previous prime is 172867615961. The next prime is 172867615993. The reversal of 172867615980 is 89516768271.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310651 + ... + 665010.

It is an arithmetic number, because the mean of its divisors is an integer number (10087369418).

Almost surely, 2^172867615980 is an apocalyptic number.

172867615980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172867615980 is an abundant number, since it is smaller than the sum of its proper divisors (311326116084).

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

172867615980 is a wasteful number, since it uses less digits than its factorization.

172867615980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978626 (or 978624 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 172867615980 in words is "one hundred seventy-two billion, eight hundred sixty-seven million, six hundred fifteen thousand, nine hundred eighty".