172816646430 has 128 divisors (see below), whose sum is σ = 451613491200. Its totient is φ = 42162422400.

The previous prime is 172816646417. The next prime is 172816646467. The reversal of 172816646430 is 34646618271.

It is a self number, because there is not a number n which added to its sum of digits gives 172816646430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8666011 + ... + 8685929.

It is an arithmetic number, because the mean of its divisors is an integer number (3528230400).

Almost surely, 2^172816646430 is an apocalyptic number.

172816646430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172816646430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225806745600).

172816646430 is an abundant number, since it is smaller than the sum of its proper divisors (278796844770).

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

172816646430 is a wasteful number, since it uses less digits than its factorization.

172816646430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20470.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 172816646430 in words is "one hundred seventy-two billion, eight hundred sixteen million, six hundred forty-six thousand, four hundred thirty".