172389800256 has 56 divisors (see below), whose sum is σ = 456533304864. Its totient is φ = 57410526720.

The previous prime is 172389800221. The next prime is 172389800263. The reversal of 172389800256 is 652008983271.

It is a junction number, because it is equal to n+sod(n) for n = 172389800199 and 172389800208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202015 + ... + 620958.

It is an arithmetic number, because the mean of its divisors is an integer number (8152380444).

Almost surely, 2^172389800256 is an apocalyptic number.

172389800256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172389800256 is an abundant number, since it is smaller than the sum of its proper divisors (284143504608).

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

172389800256 is a wasteful number, since it uses less digits than its factorization.

172389800256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824079 (or 824069 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 172389800256 in words is "one hundred seventy-two billion, three hundred eighty-nine million, eight hundred thousand, two hundred fifty-six".