11998936518913 has 4 divisors (see below), whose sum is σ = 12254233040640. Its totient is φ = 11743639997188.

The previous prime is 11998936518887. The next prime is 11998936518917. The reversal of 11998936518913 is 31981563989911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11998936518913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11998936518917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127648260793 + ... + 127648260886.

It is an arithmetic number, because the mean of its divisors is an integer number (3063558260160).

Almost surely, 2^{11998936518913} is an apocalyptic number.

It is an amenable number.

11998936518913 is a deficient number, since it is larger than the sum of its proper divisors (255296521727).

11998936518913 is an equidigital number, since it uses as much as digits as its factorization.

11998936518913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255296521726.

The product of its digits is 113374080, while the sum is 73.

The spelling of 11998936518913 in words is "eleven trillion, nine hundred ninety-eight billion, nine hundred thirty-six million, five hundred eighteen thousand, nine hundred thirteen".