172320215280 has 320 divisors, whose sum is σ = 553740558336. Its totient is φ = 44301312000.

The previous prime is 172320215261. The next prime is 172320215311. The reversal of 172320215280 is 82512023271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 520604715 + ... + 520605045.

Almost surely, 2^172320215280 is an apocalyptic number.

172320215280 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 172320215280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276870279168).

172320215280 is an abundant number, since it is smaller than the sum of its proper divisors (381420343056).

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

172320215280 is a wasteful number, since it uses less digits than its factorization.

172320215280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 172320215280 in words is "one hundred seventy-two billion, three hundred twenty million, two hundred fifteen thousand, two hundred eighty".