172389800255 has 16 divisors (see below), whose sum is σ = 207666085440. Its totient is φ = 137380209408.

The previous prime is 172389800221. The next prime is 172389800263. The reversal of 172389800255 is 552008983271.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 172389800255 - 2²⁶ = 172322691391 is a prime.

It is a partition number, being equal to the number of ways a set of 165 identical objects can be partitioned into subset.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379101 + ... + 2450489.

It is an arithmetic number, because the mean of its divisors is an integer number (12979130340).

Almost surely, 2^172389800255 is an apocalyptic number.

172389800255 is a deficient number, since it is larger than the sum of its proper divisors (35276285185).

172389800255 is a wasteful number, since it uses less digits than its factorization.

172389800255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73250.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 172389800255 in words is "one hundred seventy-two billion, three hundred eighty-nine million, eight hundred thousand, two hundred fifty-five".