13165811243365 has 16 divisors (see below), whose sum is σ = 17240625009216. Its totient is φ = 9572145894400.

The previous prime is 13165811243353. The next prime is 13165811243369. The reversal of 13165811243365 is 56334211856131.

It is not a de Polignac number, because 13165811243365 - 2⁷ = 13165811243237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13165811243369) 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 15 ways as a sum of consecutive naturals, for example, 37191676 + ... + 37544005.

It is an arithmetic number, because the mean of its divisors is an integer number (1077539063076).

Almost surely, 2^{13165811243365} is an apocalyptic number.

It is an amenable number.

13165811243365 is a deficient number, since it is larger than the sum of its proper divisors (4074813765851).

13165811243365 is a wasteful number, since it uses less digits than its factorization.

13165811243365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74738900.

The product of its digits is 1555200, while the sum is 49.

The spelling of 13165811243365 in words is "thirteen trillion, one hundred sixty-five billion, eight hundred eleven million, two hundred forty-three thousand, three hundred sixty-five".