1164579561 has 12 divisors (see below), whose sum is σ = 1682573620. Its totient is φ = 776200320.

The previous prime is 1164579553. The next prime is 1164579571. The reversal of 1164579561 is 1659754611.

1164579561 is a `hidden beast` number, since 1 + 16 + 4 + 5 + 79 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 700607961 + 463971600 = 26469^2 + 21540^2 .

It is not a de Polignac number, because 1164579561 - 2³ = 1164579553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164579571) 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, 31701 + ... + 57741.

Almost surely, 2^1164579561 is an apocalyptic number.

It is an amenable number.

1164579561 is a deficient number, since it is larger than the sum of its proper divisors (517994059).

1164579561 is a wasteful number, since it uses less digits than its factorization.

1164579561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31016 (or 31013 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 1164579561 is about 34125.9367783509. The cubic root of 1164579561 is about 1052.0984672803.

The spelling of 1164579561 in words is "one billion, one hundred sixty-four million, five hundred seventy-nine thousand, five hundred sixty-one".