172522872256 has 42 divisors (see below), whose sum is σ = 398243971608. Its totient is φ = 73938372480.

The previous prime is 172522872229. The next prime is 172522872257. The reversal of 172522872256 is 652278225271.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172522872257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27503700 + ... + 27509971.

It is an arithmetic number, because the mean of its divisors is an integer number (9481999324).

Almost surely, 2^172522872256 is an apocalyptic number.

172522872256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172522872256 is an abundant number, since it is smaller than the sum of its proper divisors (225721099352).

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

172522872256 is an equidigital number, since it uses as much as digits as its factorization.

172522872256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55013697 (or 55013680 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 49.

The spelling of 172522872256 in words is "one hundred seventy-two billion, five hundred twenty-two million, eight hundred seventy-two thousand, two hundred fifty-six".