1165515260775 has 48 divisors (see below), whose sum is σ = 1938995967744. Its totient is φ = 617740462080.

The previous prime is 1165515260753. The next prime is 1165515260779. The reversal of 1165515260775 is 5770625155611.

It is not a de Polignac number, because 1165515260775 - 2⁶ = 1165515260711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165515260779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13955692 + ... + 14038958.

It is an arithmetic number, because the mean of its divisors is an integer number (40395749328).

Almost surely, 2^{1165515260775} is an apocalyptic number.

1165515260775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165515260775 is a deficient number, since it is larger than the sum of its proper divisors (773480706969).

1165515260775 is a wasteful number, since it uses less digits than its factorization.

1165515260775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84440 (or 84435 counting only the distinct ones).

The product of its (nonzero) digits is 2205000, while the sum is 51.

The spelling of 1165515260775 in words is "one trillion, one hundred sixty-five billion, five hundred fifteen million, two hundred sixty thousand, seven hundred seventy-five".