12147999591 has 24 divisors (see below), whose sum is σ = 20291167344. Its totient is φ = 6407735040.

The previous prime is 12147999583. The next prime is 12147999599. The reversal of 12147999591 is 19599974121.

12147999591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12147999583) and next prime (12147999599).

It is not a de Polignac number, because 12147999591 - 2³ = 12147999583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147999599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3176530 + ... + 3180351.

It is an arithmetic number, because the mean of its divisors is an integer number (845465306).

Almost surely, 2^12147999591 is an apocalyptic number.

12147999591 is a deficient number, since it is larger than the sum of its proper divisors (8143167753).

12147999591 is a wasteful number, since it uses less digits than its factorization.

12147999591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356911 (or 6356904 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 57.

The spelling of 12147999591 in words is "twelve billion, one hundred forty-seven million, nine hundred ninety-nine thousand, five hundred ninety-one".