11500001115165 has 12 divisors (see below), whose sum is σ = 19933335266364. Its totient is φ = 6133333928064.

The previous prime is 11500001115131. The next prime is 11500001115181. The reversal of 11500001115165 is 56151110000511.

11500001115165 is a `hidden beast` number, since 1 + 1 + 500 + 0 + 0 + 1 + 1 + 151 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3562331607396 + 7937669507769 = 1887414^2 + 2817387^2 .

It is not a de Polignac number, because 11500001115165 - 2¹² = 11500001111069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127777790124 + ... + 127777790213.

It is an arithmetic number, because the mean of its divisors is an integer number (1661111272197).

Almost surely, 2^{11500001115165} is an apocalyptic number.

11500001115165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11500001115165 is a deficient number, since it is larger than the sum of its proper divisors (8433334151199).

11500001115165 is a wasteful number, since it uses less digits than its factorization.

11500001115165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255555580348 (or 255555580345 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

Adding to 11500001115165 its reverse (56151110000511), we get a palindrome (67651111115676).

The spelling of 11500001115165 in words is "eleven trillion, five hundred billion, one million, one hundred fifteen thousand, one hundred sixty-five".