172122701238 has 24 divisors (see below), whose sum is σ = 389146977648. Its totient is φ = 54879701712.

The previous prime is 172122701207. The next prime is 172122701273. The reversal of 172122701238 is 832107221271.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207877245 + ... + 207878072.

It is an arithmetic number, because the mean of its divisors is an integer number (16214457402).

Almost surely, 2^172122701238 is an apocalyptic number.

172122701238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172122701238 is an abundant number, since it is smaller than the sum of its proper divisors (217024276410).

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

172122701238 is a wasteful number, since it uses less digits than its factorization.

172122701238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415755348 (or 415755345 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 172122701238 in words is "one hundred seventy-two billion, one hundred twenty-two million, seven hundred one thousand, two hundred thirty-eight".