172931951680 has 56 divisors (see below), whose sum is σ = 421838003160. Its totient is φ = 67485634560.

The previous prime is 172931951659. The next prime is 172931951761. The reversal of 172931951680 is 86159139271.

It can be written as a sum of positive squares in 4 ways, for example, as 5919148096 + 167012803584 = 76936^2 + 408672^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6577275 + ... + 6603514.

It is an arithmetic number, because the mean of its divisors is an integer number (7532821485).

Almost surely, 2^172931951680 is an apocalyptic number.

172931951680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172931951680 is an abundant number, since it is smaller than the sum of its proper divisors (248906051480).

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

172931951680 is a wasteful number, since it uses less digits than its factorization.

172931951680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180847 (or 13180837 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 172931951680 in words is "one hundred seventy-two billion, nine hundred thirty-one million, nine hundred fifty-one thousand, six hundred eighty".