172378662230238 has 16 divisors (see below), whose sum is σ = 344757455898240. Its totient is φ = 57459532170456.

The previous prime is 172378662230233. The next prime is 172378662230249. The reversal of 172378662230238 is 832032266873271.

It is a super-2 number, since 2×172378662230238² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172378662230233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22816023 + ... + 29416461.

It is an arithmetic number, because the mean of its divisors is an integer number (21547340993640).

Almost surely, 2^{172378662230238} is an apocalyptic number.

172378662230238 is an abundant number, since it is smaller than the sum of its proper divisors (172378793668002).

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

172378662230238 is a wasteful number, since it uses less digits than its factorization.

172378662230238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10953151.

The product of its (nonzero) digits is 48771072, while the sum is 60.

The spelling of 172378662230238 in words is "one hundred seventy-two trillion, three hundred seventy-eight billion, six hundred sixty-two million, two hundred thirty thousand, two hundred thirty-eight".