172733308128 has 36 divisors (see below), whose sum is σ = 491210345808. Its totient is φ = 57577769280.

The previous prime is 172733308061. The next prime is 172733308129. The reversal of 172733308128 is 821803337271.

It is a happy number.

172733308128 is a `hidden beast` number, since 172 + 73 + 330 + 81 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172733308129) 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, 299883928 + ... + 299884503.

It is an arithmetic number, because the mean of its divisors is an integer number (13644731828).

Almost surely, 2^172733308128 is an apocalyptic number.

172733308128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172733308128 is an abundant number, since it is smaller than the sum of its proper divisors (318477037680).

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

172733308128 is a wasteful number, since it uses less digits than its factorization.

172733308128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599768447 (or 599768436 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 172733308128 in words is "one hundred seventy-two billion, seven hundred thirty-three million, three hundred eight thousand, one hundred twenty-eight".