169937695225 has 27 divisors (see below), whose sum is σ = 218316396493. Its totient is φ = 131216049440.

The previous prime is 169937695183. The next prime is 169937695229. The reversal of 169937695225 is 522596739961.

The square root of 169937695225 is 412235.

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 2335885561 + 167601809664 = 48331^2 + 409392^2 .

It is not a de Polignac number, because 169937695225 - 2¹⁵ = 169937662457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169937695229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 59772654 + ... + 59775496.

Almost surely, 2^169937695225 is an apocalyptic number.

169937695225 is the 412235-th square number.

169937695225 is the 206118-th centered octagonal number.

It is an amenable number.

169937695225 is a deficient number, since it is larger than the sum of its proper divisors (48378701268).

169937695225 is an frugal number, since it uses more digits than its factorization.

169937695225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754 (or 2877 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 64.

Multiplying 169937695225 by its sum of digits (64), we get a square (10876012494400 = 3297880²).

The spelling of 169937695225 in words is "one hundred sixty-nine billion, nine hundred thirty-seven million, six hundred ninety-five thousand, two hundred twenty-five".