172158392320 has 96 divisors (see below), whose sum is σ = 413381404800. Its totient is φ = 68812996608.

The previous prime is 172158392297. The next prime is 172158392383. The reversal of 172158392320 is 23293851271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16040716 + ... + 16051444.

It is an arithmetic number, because the mean of its divisors is an integer number (4306056300).

Almost surely, 2^172158392320 is an apocalyptic number.

172158392320 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 172158392320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206690702400).

172158392320 is an abundant number, since it is smaller than the sum of its proper divisors (241223012480).

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

172158392320 is a wasteful number, since it uses less digits than its factorization.

172158392320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12323 (or 12303 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 172158392320 in words is "one hundred seventy-two billion, one hundred fifty-eight million, three hundred ninety-two thousand, three hundred twenty".