12784811519 has 2 divisors, whose sum is σ = 12784811520. Its totient is φ = 12784811518.

The previous prime is 12784811513. The next prime is 12784811569. The reversal of 12784811519 is 91511848721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12784811519 - 2²⁴ = 12768034303 is a prime.

It is a super-2 number, since 2×12784811519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12784811513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392405759 + 6392405760.

It is an arithmetic number, because the mean of its divisors is an integer number (6392405760).

Almost surely, 2^12784811519 is an apocalyptic number.

12784811519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12784811519 is an equidigital number, since it uses as much as digits as its factorization.

12784811519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 47.

The spelling of 12784811519 in words is "twelve billion, seven hundred eighty-four million, eight hundred eleven thousand, five hundred nineteen".