1169610561 has 12 divisors (see below), whose sum is σ = 1930785792. Its totient is φ = 668348856.

The previous prime is 1169610551. The next prime is 1169610601. The reversal of 1169610561 is 1650169611.

1169610561 is a `hidden beast` number, since 1 + 1 + 6 + 96 + 1 + 0 + 561 = 666.

It is not a de Polignac number, because 1169610561 - 2⁵ = 1169610529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1169610521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9282561 + ... + 9282686.

It is an arithmetic number, because the mean of its divisors is an integer number (160898816).

Almost surely, 2^1169610561 is an apocalyptic number.

It is an amenable number.

1169610561 is a deficient number, since it is larger than the sum of its proper divisors (761175231).

1169610561 is a wasteful number, since it uses less digits than its factorization.

1169610561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18565260 (or 18565257 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1169610561 is about 34199.5696025549. The cubic root of 1169610561 is about 1053.6113175561.

The spelling of 1169610561 in words is "one billion, one hundred sixty-nine million, six hundred ten thousand, five hundred sixty-one".