169132320049 has 63 divisors (see below), whose sum is σ = 218897875371. Its totient is φ = 130582322640.

The previous prime is 169132320041. The next prime is 169132320073. The reversal of 169132320049 is 940023231961.

The square root of 169132320049 is 411257.

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

It can be written as a sum of positive squares in only one way, i.e., 117884415649 + 51247904400 = 343343^2 + 226380^2 .

It is not a de Polignac number, because 169132320049 - 2³ = 169132320041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169132319993 and 169132320020.

It is not an unprimeable number, because it can be changed into a prime (169132320041) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 1551672607 + ... + 1551672715.

Almost surely, 2^169132320049 is an apocalyptic number.

169132320049 is the 411257-th square number.

169132320049 is the 205629-th centered octagonal number.

It is an amenable number.

169132320049 is a deficient number, since it is larger than the sum of its proper divisors (49765555322).

169132320049 is an frugal number, since it uses more digits than its factorization.

169132320049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 169132320049 in words is "one hundred sixty-nine billion, one hundred thirty-two million, three hundred twenty thousand, forty-nine".