172796387520 has 224 divisors, whose sum is σ = 569775368448. Its totient is φ = 44334968832.

The previous prime is 172796387479. The next prime is 172796387597. The reversal of 172796387520 is 25783697271.

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 31 ways as a sum of consecutive naturals, for example, 2734522 + ... + 2796998.

Almost surely, 2^172796387520 is an apocalyptic number.

172796387520 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 172796387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284887684224).

172796387520 is an abundant number, since it is smaller than the sum of its proper divisors (396978980928).

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

172796387520 is a wasteful number, since it uses less digits than its factorization.

172796387520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62607 (or 62597 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 172796387520 in words is "one hundred seventy-two billion, seven hundred ninety-six million, three hundred eighty-seven thousand, five hundred twenty".