172168647438 has 32 divisors (see below), whose sum is σ = 350871059232. Its totient is φ = 56300816000.

The previous prime is 172168647433. The next prime is 172168647439. The reversal of 172168647438 is 834746861271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172168647433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3825748 + ... + 3870488.

It is an arithmetic number, because the mean of its divisors is an integer number (10964720601).

Almost surely, 2^172168647438 is an apocalyptic number.

172168647438 is an abundant number, since it is smaller than the sum of its proper divisors (178702411794).

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

172168647438 is a wasteful number, since it uses less digits than its factorization.

172168647438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56900.

The product of its digits is 10838016, while the sum is 57.

The spelling of 172168647438 in words is "one hundred seventy-two billion, one hundred sixty-eight million, six hundred forty-seven thousand, four hundred thirty-eight".