172168518834 has 48 divisors (see below), whose sum is σ = 401764016472. Its totient is φ = 52969987584.

The previous prime is 172168518817. The next prime is 172168518857. The reversal of 172168518834 is 438815861271.

172168518834 is a `hidden beast` number, since 17 + 21 + 68 + 518 + 8 + 34 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31653747225 + 140514771609 = 177915^2 + 374853^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3083832 + ... + 3139164.

Almost surely, 2^172168518834 is an apocalyptic number.

172168518834 is an abundant number, since it is smaller than the sum of its proper divisors (229595497638).

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

172168518834 is a wasteful number, since it uses less digits than its factorization.

172168518834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68651 (or 68648 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 172168518834 in words is "one hundred seventy-two billion, one hundred sixty-eight million, five hundred eighteen thousand, eight hundred thirty-four".