172129607420 has 48 divisors (see below), whose sum is σ = 362121913440. Its totient is φ = 68728203264.

The previous prime is 172129607389. The next prime is 172129607509. The reversal of 172129607420 is 24706921271.

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, 38617832 + ... + 38622288.

It is an arithmetic number, because the mean of its divisors is an integer number (7544206530).

Almost surely, 2^172129607420 is an apocalyptic number.

172129607420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172129607420 is an abundant number, since it is smaller than the sum of its proper divisors (189992306020).

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

172129607420 is a wasteful number, since it uses less digits than its factorization.

172129607420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7502 (or 7500 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 172129607420 in words is "one hundred seventy-two billion, one hundred twenty-nine million, six hundred seven thousand, four hundred twenty".