12785724719 has 2 divisors, whose sum is σ = 12785724720. Its totient is φ = 12785724718.

The previous prime is 12785724691. The next prime is 12785724751. The reversal of 12785724719 is 91742758721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12785724719 - 2²⁸ = 12517289263 is a prime.

It is a super-2 number, since 2×12785724719² (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 (12785724799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392862359 + 6392862360.

It is an arithmetic number, because the mean of its divisors is an integer number (6392862360).

Almost surely, 2^12785724719 is an apocalyptic number.

12785724719 is a deficient number, since it is larger than the sum of its proper divisors (1).

12785724719 is an equidigital number, since it uses as much as digits as its factorization.

12785724719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975680, while the sum is 53.

The spelling of 12785724719 in words is "twelve billion, seven hundred eighty-five million, seven hundred twenty-four thousand, seven hundred nineteen".