172730373408 has 36 divisors (see below), whose sum is σ = 491202000198. Its totient is φ = 57576791040.

The previous prime is 172730373379. The next prime is 172730373433. The reversal of 172730373408 is 804373037271.

172730373408 is a `hidden beast` number, since 1 + 7 + 273 + 0 + 37 + 340 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 114847787664 + 57882585744 = 338892^2 + 240588^2 .

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

It is a super-2 number, since 2×172730373408² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 299878833 + ... + 299879408.

Almost surely, 2^172730373408 is an apocalyptic number.

172730373408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172730373408 is an abundant number, since it is smaller than the sum of its proper divisors (318471626790).

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

172730373408 is a wasteful number, since it uses less digits than its factorization.

172730373408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599758257 (or 599758246 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 172730373408 in words is "one hundred seventy-two billion, seven hundred thirty million, three hundred seventy-three thousand, four hundred eight".