16870355172 has 72 divisors (see below), whose sum is σ = 46680379200. Its totient is φ = 5094745920.

The previous prime is 16870355141. The next prime is 16870355213. The reversal of 16870355172 is 27155307861.

It is a happy number.

16870355172 is a `hidden beast` number, since 1 + 68 + 70 + 3 + 5 + 517 + 2 = 666.

It is a super-3 number, since 3×16870355172³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43329 + ... + 188727.

It is an arithmetic number, because the mean of its divisors is an integer number (648338600).

Almost surely, 2^16870355172 is an apocalyptic number.

16870355172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16870355172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23340189600).

16870355172 is an abundant number, since it is smaller than the sum of its proper divisors (29810024028).

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

16870355172 is a wasteful number, since it uses less digits than its factorization.

16870355172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145713 (or 145708 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 16870355172 in words is "sixteen billion, eight hundred seventy million, three hundred fifty-five thousand, one hundred seventy-two".