1161565116 has 24 divisors (see below), whose sum is σ = 2711012304. Its totient is φ = 387089280.

The previous prime is 1161565109. The next prime is 1161565177. The reversal of 1161565116 is 6115651611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48376 + ... + 68288.

It is an arithmetic number, because the mean of its divisors is an integer number (112958846).

Almost surely, 2^1161565116 is an apocalyptic number.

It is an amenable number.

1161565116 is an abundant number, since it is smaller than the sum of its proper divisors (1549447188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161565116 is a wasteful number, since it uses less digits than its factorization.

1161565116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24781 (or 24779 counting only the distinct ones).

The product of its digits is 5400, while the sum is 33.

The square root of 1161565116 is about 34081.7416808472. The cubic root of 1161565116 is about 1051.1899181297.

The spelling of 1161565116 in words is "one billion, one hundred sixty-one million, five hundred sixty-five thousand, one hundred sixteen".