172129208964 has 12 divisors (see below), whose sum is σ = 401634820944. Its totient is φ = 57376402984.

The previous prime is 172129208939. The next prime is 172129209001. The reversal of 172129208964 is 469802921271.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7172050362 + ... + 7172050385.

It is an arithmetic number, because the mean of its divisors is an integer number (33469568412).

Almost surely, 2^172129208964 is an apocalyptic number.

It is an amenable number.

172129208964 is an abundant number, since it is smaller than the sum of its proper divisors (229505611980).

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

172129208964 is a wasteful number, since it uses less digits than its factorization.

172129208964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14344100754 (or 14344100752 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 172129208964 in words is "one hundred seventy-two billion, one hundred twenty-nine million, two hundred eight thousand, nine hundred sixty-four".