12158464999591 has 4 divisors (see below), whose sum is σ = 12577722413400. Its totient is φ = 11739207585784.

The previous prime is 12158464999589. The next prime is 12158464999627. The reversal of 12158464999591 is 19599946485121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12158464999591 - 2¹ = 12158464999589 is a prime.

It is a super-2 number, since 2×12158464999591² (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 (12158464999511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209628706861 + ... + 209628706918.

It is an arithmetic number, because the mean of its divisors is an integer number (3144430603350).

Almost surely, 2^{12158464999591} is an apocalyptic number.

12158464999591 is a deficient number, since it is larger than the sum of its proper divisors (419257413809).

12158464999591 is an equidigital number, since it uses as much as digits as its factorization.

12158464999591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419257413808.

The product of its digits is 251942400, while the sum is 73.

The spelling of 12158464999591 in words is "twelve trillion, one hundred fifty-eight billion, four hundred sixty-four million, nine hundred ninety-nine thousand, five hundred ninety-one".