169756360225 has 27 divisors (see below), whose sum is σ = 222211055577. Its totient is φ = 128627786880.

The previous prime is 169756360171. The next prime is 169756360237. The reversal of 169756360225 is 522063657961.

The square root of 169756360225 is 412015.

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 90725656849 + 79030703376 = 301207^2 + 281124^2 .

It is not a de Polignac number, because 169756360225 - 2³³ = 161166425633 is a prime.

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 39139257 + ... + 39143593.

Almost surely, 2^169756360225 is an apocalyptic number.

169756360225 is the 412015-th square number.

169756360225 is the 206008-th centered octagonal number.

It is an amenable number.

169756360225 is a deficient number, since it is larger than the sum of its proper divisors (52454695352).

169756360225 is an frugal number, since it uses more digits than its factorization.

169756360225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8722 (or 4361 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 169756360225 in words is "one hundred sixty-nine billion, seven hundred fifty-six million, three hundred sixty thousand, two hundred twenty-five".