172018172352 has 84 divisors (see below), whose sum is σ = 492834701400. Its totient is φ = 52928658432.

The previous prime is 172018172351. The next prime is 172018172363. The reversal of 172018172352 is 253271810271.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 172018172352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172018172351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2618227 + ... + 2683122.

Almost surely, 2^172018172352 is an apocalyptic number.

172018172352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172018172352 is an abundant number, since it is smaller than the sum of its proper divisors (320816529048).

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

172018172352 is a wasteful number, since it uses less digits than its factorization.

172018172352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5301390 (or 5301367 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The spelling of 172018172352 in words is "one hundred seventy-two billion, eighteen million, one hundred seventy-two thousand, three hundred fifty-two".