161160563565 has 24 divisors (see below), whose sum is σ = 280226216088. Its totient is φ = 85681150080.

The previous prime is 161160563563. The next prime is 161160563579. The reversal of 161160563565 is 565365061161.

161160563565 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 6 + 0 + 5 + 635 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1043742249 + 160116821316 = 32307^2 + 400146^2 .

It is not a de Polignac number, because 161160563565 - 2¹ = 161160563563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 161160563565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161160563563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5634546 + ... + 5663075.

It is an arithmetic number, because the mean of its divisors is an integer number (11676092337).

Almost surely, 2^161160563565 is an apocalyptic number.

161160563565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161160563565 is a deficient number, since it is larger than the sum of its proper divisors (119065652523).

161160563565 is a wasteful number, since it uses less digits than its factorization.

161160563565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11297949 (or 11297946 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 161160563565 in words is "one hundred sixty-one billion, one hundred sixty million, five hundred sixty-three thousand, five hundred sixty-five".