172899947180 has 96 divisors (see below), whose sum is σ = 384964392960. Its totient is φ = 65047207680.

The previous prime is 172899947167. The next prime is 172899947267. The reversal of 172899947180 is 81749998271.

172899947180 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59887697 + ... + 59890583.

It is an arithmetic number, because the mean of its divisors is an integer number (4010045760).

Almost surely, 2^172899947180 is an apocalyptic number.

172899947180 is a gapful number since it is divisible by the number (10) 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 172899947180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192482196480).

172899947180 is an abundant number, since it is smaller than the sum of its proper divisors (212064445780).

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

172899947180 is a wasteful number, since it uses less digits than its factorization.

172899947180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999 (or 3997 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 65.

The spelling of 172899947180 in words is "one hundred seventy-two billion, eight hundred ninety-nine million, nine hundred forty-seven thousand, one hundred eighty".