169061495593225 has 243 divisors, whose sum is σ = 240374394962847. Its totient is φ = 117912519106560.

The previous prime is 169061495593217. The next prime is 169061495593229. The reversal of 169061495593225 is 522395594160961.

The square root of 169061495593225 is 13002365.

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

It can be written as a sum of positive squares in 13 ways, for example, as 67324174727161 + 101737320866064 = 8205131^2 + 10086492^2 .

It is not a de Polignac number, because 169061495593225 - 2³ = 169061495593217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (169061495593229) by changing a digit.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 1742902016377 + ... + 1742902016473.

Almost surely, 2^{169061495593225} is an apocalyptic number.

169061495593225 is the 13002365-th square number.

169061495593225 is the 6501183-rd centered octagonal number.

It is an amenable number.

169061495593225 is a deficient number, since it is larger than the sum of its proper divisors (71312899369622).

169061495593225 is an frugal number, since it uses more digits than its factorization.

169061495593225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 157464000, while the sum is 67.

The spelling of 169061495593225 in words is "one hundred sixty-nine trillion, sixty-one billion, four hundred ninety-five million, five hundred ninety-three thousand, two hundred twenty-five".