12311198887537 has 4 divisors (see below), whose sum is σ = 13430398786416. Its totient is φ = 11191998988660.

The previous prime is 12311198887529. The next prime is 12311198887541. The reversal of 12311198887537 is 73578889111321.

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 not a de Polignac number, because 12311198887537 - 2³ = 12311198887529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311198887517) 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 3 ways as a sum of consecutive naturals, for example, 559599949423 + ... + 559599949444.

It is an arithmetic number, because the mean of its divisors is an integer number (3357599696604).

Almost surely, 2^{12311198887537} is an apocalyptic number.

It is an amenable number.

12311198887537 is a deficient number, since it is larger than the sum of its proper divisors (1119199898879).

12311198887537 is a wasteful number, since it uses less digits than its factorization.

12311198887537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119199898878.

The product of its digits is 20321280, while the sum is 64.

The spelling of 12311198887537 in words is "twelve trillion, three hundred eleven billion, one hundred ninety-eight million, eight hundred eighty-seven thousand, five hundred thirty-seven".