1155497565 has 32 divisors (see below), whose sum is σ = 2020709376. Its totient is φ = 561300480.

The previous prime is 1155497527. The next prime is 1155497579. The reversal of 1155497565 is 5657945511.

It is not a de Polignac number, because 1155497565 - 2⁶ = 1155497501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65182 + ... + 80991.

It is an arithmetic number, because the mean of its divisors is an integer number (63147168).

Almost surely, 2^1155497565 is an apocalyptic number.

1155497565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155497565 is a deficient number, since it is larger than the sum of its proper divisors (865211811).

1155497565 is a wasteful number, since it uses less digits than its factorization.

1155497565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146229.

The product of its digits is 945000, while the sum is 48.

The square root of 1155497565 is about 33992.6104469780. The cubic root of 1155497565 is about 1049.3563901529.

The spelling of 1155497565 in words is "one billion, one hundred fifty-five million, four hundred ninety-seven thousand, five hundred sixty-five".