1155108865 has 8 divisors (see below), whose sum is σ = 1391285160. Its totient is φ = 920650752.

The previous prime is 1155108863. The next prime is 1155108901. The reversal of 1155108865 is 5688015511.

It can be written as a sum of positive squares in 4 ways, for example, as 154778481 + 1000330384 = 12441^2 + 31628^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1155108865 - 2¹ = 1155108863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155108863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428064 + ... + 430753.

It is an arithmetic number, because the mean of its divisors is an integer number (173910645).

Almost surely, 2^1155108865 is an apocalyptic number.

It is an amenable number.

1155108865 is a deficient number, since it is larger than the sum of its proper divisors (236176295).

1155108865 is an equidigital number, since it uses as much as digits as its factorization.

1155108865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859091.

The product of its (nonzero) digits is 48000, while the sum is 40.

The square root of 1155108865 is about 33986.8925469805. The cubic root of 1155108865 is about 1049.2387119664.

The spelling of 1155108865 in words is "one billion, one hundred fifty-five million, one hundred eight thousand, eight hundred sixty-five".