12087363565991 has 16 divisors (see below), whose sum is σ = 14544497026560. Its totient is φ = 9813069997920.

The previous prime is 12087363565973. The next prime is 12087363565999. The reversal of 12087363565991 is 19956536378021.

It is a de Polignac number, because none of the positive numbers 2^k-12087363565991 is a prime.

It is a super-2 number, since 2×12087363565991² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12087363565999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9749795 + ... + 10919396.

It is an arithmetic number, because the mean of its divisors is an integer number (909031064160).

Almost surely, 2^{12087363565991} is an apocalyptic number.

12087363565991 is a deficient number, since it is larger than the sum of its proper divisors (2457133460569).

12087363565991 is a wasteful number, since it uses less digits than its factorization.

12087363565991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20673614.

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 12087363565991 in words is "twelve trillion, eighty-seven billion, three hundred sixty-three million, five hundred sixty-five thousand, nine hundred ninety-one".