1165912755975 has 96 divisors (see below), whose sum is σ = 2371410958080. Its totient is φ = 556853616000.

The previous prime is 1165912755961. The next prime is 1165912756051. The reversal of 1165912755975 is 5795572195611.

1165912755975 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 9 + 1 + 2 + 7 + 559 + 75 = 666.

It is not a de Polignac number, because 1165912755975 - 2⁶ = 1165912755911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 674356 + ... + 1669305.

It is an arithmetic number, because the mean of its divisors is an integer number (24702197480).

Almost surely, 2^{1165912755975} is an apocalyptic number.

1165912755975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165912755975 is an abundant number, since it is smaller than the sum of its proper divisors (1205498202105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165912755975 is a wasteful number, since it uses less digits than its factorization.

1165912755975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343758 (or 2343747 counting only the distinct ones).

The product of its digits is 29767500, while the sum is 63.

The spelling of 1165912755975 in words is "one trillion, one hundred sixty-five billion, nine hundred twelve million, seven hundred fifty-five thousand, nine hundred seventy-five".