1165554011099 has 2 divisors, whose sum is σ = 1165554011100. Its totient is φ = 1165554011098.

The previous prime is 1165554011093. The next prime is 1165554011177. The reversal of 1165554011099 is 9901104555611.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1165554011099 - 2³² = 1161259043803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165554011093) 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 as a sum of consecutive naturals, namely, 582777005549 + 582777005550.

It is an arithmetic number, because the mean of its divisors is an integer number (582777005550).

Almost surely, 2^{1165554011099} is an apocalyptic number.

1165554011099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165554011099 is an equidigital number, since it uses as much as digits as its factorization.

1165554011099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 47.

The spelling of 1165554011099 in words is "one trillion, one hundred sixty-five billion, five hundred fifty-four million, eleven thousand, ninety-nine".