1159638265 has 8 divisors (see below), whose sum is σ = 1452068928. Its totient is φ = 887375280.

The previous prime is 1159638253. The next prime is 1159638269. The reversal of 1159638265 is 5628369511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1159638265 - 2²¹ = 1157541113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1159638269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5041791 + ... + 5042020.

It is an arithmetic number, because the mean of its divisors is an integer number (181508616).

Almost surely, 2^1159638265 is an apocalyptic number.

It is an amenable number.

1159638265 is a deficient number, since it is larger than the sum of its proper divisors (292430663).

1159638265 is a wasteful number, since it uses less digits than its factorization.

1159638265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10083839.

The product of its digits is 388800, while the sum is 46.

The square root of 1159638265 is about 34053.4618651320. The cubic root of 1159638265 is about 1050.6083443730.

The spelling of 1159638265 in words is "one billion, one hundred fifty-nine million, six hundred thirty-eight thousand, two hundred sixty-five".