172728578332392 has 256 divisors, whose sum is σ = 464742061056000. Its totient is φ = 53336729104128.

The previous prime is 172728578332363. The next prime is 172728578332393. The reversal of 172728578332392 is 293233875827271.

It is not an unprimeable number, because it can be changed into a prime (172728578332393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7901932359 + ... + 7901954217.

It is an arithmetic number, because the mean of its divisors is an integer number (1815398676000).

Almost surely, 2^{172728578332392} is an apocalyptic number.

172728578332392 is a gapful number since it is divisible by the number (12) 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 172728578332392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232371030528000).

172728578332392 is an abundant number, since it is smaller than the sum of its proper divisors (292013482723608).

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

172728578332392 is a wasteful number, since it uses less digits than its factorization.

172728578332392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24100 (or 24096 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 69.

The spelling of 172728578332392 in words is "one hundred seventy-two trillion, seven hundred twenty-eight billion, five hundred seventy-eight million, three hundred thirty-two thousand, three hundred ninety-two".