1163965265 has 16 divisors (see below), whose sum is σ = 1481804928. Its totient is φ = 874688256.

The previous prime is 1163965259. The next prime is 1163965273. The reversal of 1163965265 is 5625693611.

It is a cyclic number.

It is not a de Polignac number, because 1163965265 - 2⁸ = 1163965009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31364 + ... + 57546.

It is an arithmetic number, because the mean of its divisors is an integer number (92612808).

Almost surely, 2^1163965265 is an apocalyptic number.

It is an amenable number.

1163965265 is a deficient number, since it is larger than the sum of its proper divisors (317839663).

1163965265 is a wasteful number, since it uses less digits than its factorization.

1163965265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26728.

The product of its digits is 291600, while the sum is 44.

The square root of 1163965265 is about 34116.9351642260. The cubic root of 1163965265 is about 1051.9134467023.

The spelling of 1163965265 in words is "one billion, one hundred sixty-three million, nine hundred sixty-five thousand, two hundred sixty-five".