12147705519 has 4 divisors (see below), whose sum is σ = 16196940696. Its totient is φ = 8098470344.

The previous prime is 12147705433. The next prime is 12147705551. The reversal of 12147705519 is 91550774121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91550774121 = 3 ⋅30516924707.

It is a cyclic number.

It is not a de Polignac number, because 12147705519 - 2⁷ = 12147705391 is a prime.

It is a super-2 number, since 2×12147705519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147705569) 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, 2024617584 + ... + 2024617589.

It is an arithmetic number, because the mean of its divisors is an integer number (4049235174).

Almost surely, 2^12147705519 is an apocalyptic number.

12147705519 is a deficient number, since it is larger than the sum of its proper divisors (4049235177).

12147705519 is an equidigital number, since it uses as much as digits as its factorization.

12147705519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049235176.

The product of its (nonzero) digits is 88200, while the sum is 42.

The spelling of 12147705519 in words is "twelve billion, one hundred forty-seven million, seven hundred five thousand, five hundred nineteen".