115863565 has 16 divisors (see below), whose sum is σ = 142138800. Its totient is φ = 90634752.

The previous prime is 115863547. The next prime is 115863607. The reversal of 115863565 is 565368511.

It can be written as a sum of positive squares in 8 ways, for example, as 8305924 + 107557641 = 2882^2 + 10371^2 .

It is a cyclic number.

It is not a de Polignac number, because 115863565 - 2¹⁵ = 115830797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107851 + ... + 108919.

It is an arithmetic number, because the mean of its divisors is an integer number (8883675).

Almost surely, 2^115863565 is an apocalyptic number.

It is an amenable number.

115863565 is a deficient number, since it is larger than the sum of its proper divisors (26275235).

115863565 is a wasteful number, since it uses less digits than its factorization.

115863565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its digits is 108000, while the sum is 40.

The square root of 115863565 is about 10763.9939148998. The cubic root of 115863565 is about 487.5086161089.

It can be divided in two parts, 11586 and 3565, that added together give a palindrome (15151).

The spelling of 115863565 in words is "one hundred fifteen million, eight hundred sixty-three thousand, five hundred sixty-five".