1161564784 has 20 divisors (see below), whose sum is σ = 2272384816. Its totient is φ = 575142912.

The previous prime is 1161564779. The next prime is 1161564793. The reversal of 1161564784 is 4874651611.

It is a self number, because there is not a number n which added to its sum of digits gives 1161564784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350769 + ... + 354064.

Almost surely, 2^1161564784 is an apocalyptic number.

It is an amenable number.

1161564784 is a deficient number, since it is larger than the sum of its proper divisors (1110820032).

1161564784 is a wasteful number, since it uses less digits than its factorization.

1161564784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704944 (or 704938 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 1161564784 is about 34081.7368102038. The cubic root of 1161564784 is about 1051.1898179789.

The spelling of 1161564784 in words is "one billion, one hundred sixty-one million, five hundred sixty-four thousand, seven hundred eighty-four".