172581996320 has 48 divisors (see below), whose sum is σ = 408000830328. Its totient is φ = 68986091520.

The previous prime is 172581996277. The next prime is 172581996409. The reversal of 172581996320 is 23699185271.

It can be written as a sum of positive squares in 4 ways, for example, as 155428331536 + 17153664784 = 394244^2 + 130972^2 .

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, 127199 + ... + 601118.

Almost surely, 2^172581996320 is an apocalyptic number.

172581996320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172581996320 is an abundant number, since it is smaller than the sum of its proper divisors (235418834008).

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

172581996320 is a wasteful number, since it uses less digits than its factorization.

172581996320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729813 (or 729805 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 172581996320 in words is "one hundred seventy-two billion, five hundred eighty-one million, nine hundred ninety-six thousand, three hundred twenty".