172160581320 has 384 divisors, whose sum is σ = 698350947840. Its totient is φ = 35811901440.

The previous prime is 172160581273. The next prime is 172160581339. The reversal of 172160581320 is 23185061271.

172160581320 is a `hidden beast` number, since 1 + 7 + 21 + 605 + 8 + 1 + 3 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2288952 + ... + 2362968.

It is an arithmetic number, because the mean of its divisors is an integer number (1818622260).

Almost surely, 2^172160581320 is an apocalyptic number.

172160581320 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 172160581320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349175473920).

172160581320 is an abundant number, since it is smaller than the sum of its proper divisors (526190366520).

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

172160581320 is a wasteful number, since it uses less digits than its factorization.

172160581320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74125 (or 74118 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 172160581320 in words is "one hundred seventy-two billion, one hundred sixty million, five hundred eighty-one thousand, three hundred twenty".