126469569565161 has 45 divisors (see below), whose sum is σ = 191558316690741. Its totient is φ = 83153214923328.

The previous prime is 126469569565139. The next prime is 126469569565177. The reversal of 126469569565161 is 161565965964621.

It is a happy number.

The square root of 126469569565161 is 11245869.

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

126469569565161 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 6 + 9 + 56 + 9 + 56 + 516 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 50636473996761 + 75833095568400 = 7115931^2 + 8708220^2 .

It is not a de Polignac number, because 126469569565161 - 2⁹ = 126469569564649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126469569565161.

It is not an unprimeable number, because it can be changed into a prime (126469569515161) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7388527375 + ... + 7388544491.

Almost surely, 2^{126469569565161} is an apocalyptic number.

126469569565161 is the 11245869-th square number.

126469569565161 is the 5622935-th centered octagonal number.

It is an amenable number.

126469569565161 is a deficient number, since it is larger than the sum of its proper divisors (65088747125580).

126469569565161 is an frugal number, since it uses more digits than its factorization.

126469569565161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34392 (or 17193 counting only the distinct ones).

The product of its digits is 629856000, while the sum is 72.

The spelling of 126469569565161 in words is "one hundred twenty-six trillion, four hundred sixty-nine billion, five hundred sixty-nine million, five hundred sixty-five thousand, one hundred sixty-one".