11775817077165 has 12 divisors (see below), whose sum is σ = 20411416267164. Its totient is φ = 6280435774464.

The previous prime is 11775817077151. The next prime is 11775817077203. The reversal of 11775817077165 is 56177071857711.

It can be written as a sum of positive squares in 2 ways, for example, as 5141674160676 + 6634142916489 = 2267526^2 + 2575683^2 .

It is not a de Polignac number, because 11775817077165 - 2¹³ = 11775817068973 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 130842411924 + ... + 130842412013.

It is an arithmetic number, because the mean of its divisors is an integer number (1700951355597).

Almost surely, 2^{11775817077165} is an apocalyptic number.

11775817077165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11775817077165 is a deficient number, since it is larger than the sum of its proper divisors (8635599189999).

11775817077165 is a wasteful number, since it uses less digits than its factorization.

11775817077165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261684823948 (or 261684823945 counting only the distinct ones).

The product of its (nonzero) digits is 20168400, while the sum is 63.

The spelling of 11775817077165 in words is "eleven trillion, seven hundred seventy-five billion, eight hundred seventeen million, seventy-seven thousand, one hundred sixty-five".