172291933136 has 20 divisors (see below), whose sum is σ = 335941839492. Its totient is φ = 85597264896.

The previous prime is 172291933129. The next prime is 172291933157. The reversal of 172291933136 is 631339192271.

It can be written as a sum of positive squares in 2 ways, for example, as 83752360000 + 88539573136 = 289400^2 + 297556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34291265 + ... + 34296288.

Almost surely, 2^172291933136 is an apocalyptic number.

172291933136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172291933136 is a deficient number, since it is larger than the sum of its proper divisors (163649906356).

172291933136 is a wasteful number, since it uses less digits than its factorization.

172291933136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68587718 (or 68587712 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The spelling of 172291933136 in words is "one hundred seventy-two billion, two hundred ninety-one million, nine hundred thirty-three thousand, one hundred thirty-six".