172168668500 has 48 divisors (see below), whose sum is σ = 378323400000. Its totient is φ = 68444935200.

The previous prime is 172168668493. The next prime is 172168668571. The reversal of 172168668500 is 5866861271.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974750 + ... + 1137749.

It is an arithmetic number, because the mean of its divisors is an integer number (7881737500).

Almost surely, 2^172168668500 is an apocalyptic number.

172168668500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172168668500 is an abundant number, since it is smaller than the sum of its proper divisors (206154731500).

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

172168668500 is a wasteful number, since it uses less digits than its factorization.

172168668500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112681 (or 2112669 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 172168668500 in words is "one hundred seventy-two billion, one hundred sixty-eight million, six hundred sixty-eight thousand, five hundred".