16870113225 has 81 divisors (see below), whose sum is σ = 35177950197. Its totient is φ = 7705817280.

The previous prime is 16870113203. The next prime is 16870113241. The reversal of 16870113225 is 52231107861.

The square root of 16870113225 is 129885.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 266244489 + 16603868736 = 16317^2 + 128856^2 .

It is not a de Polignac number, because 16870113225 - 2²⁵ = 16836558793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16870113225.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 13637307 + ... + 13638543.

Almost surely, 2^16870113225 is an apocalyptic number.

16870113225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16870113225 is the 129885-th square number.

16870113225 is the 64943-rd centered octagonal number.

It is an amenable number.

16870113225 is an abundant number, since it is smaller than the sum of its proper divisors (18307836972).

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

16870113225 is an equidigital number, since it uses as much as digits as its factorization.

16870113225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Multiplying 16870113225 by its sum of digits (36), we get a square (607324076100 = 779310²).

The spelling of 16870113225 in words is "sixteen billion, eight hundred seventy million, one hundred thirteen thousand, two hundred twenty-five".