12547991119 has 4 divisors (see below), whose sum is σ = 12554424640. Its totient is φ = 12541557600.

The previous prime is 12547991089. The next prime is 12547991123. The reversal of 12547991119 is 91119974521.

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 12547991119 - 2²⁵ = 12514436687 is a prime.

It is a super-2 number, since 2×12547991119² (a number of 21 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 (12547091119) 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, 3213834 + ... + 3217735.

It is an arithmetic number, because the mean of its divisors is an integer number (3138606160).

Almost surely, 2^12547991119 is an apocalyptic number.

12547991119 is a deficient number, since it is larger than the sum of its proper divisors (6433521).

12547991119 is an equidigital number, since it uses as much as digits as its factorization.

12547991119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433520.

The product of its digits is 204120, while the sum is 49.

The spelling of 12547991119 in words is "twelve billion, five hundred forty-seven million, nine hundred ninety-one thousand, one hundred nineteen".