12857144819 has 2 divisors, whose sum is σ = 12857144820. Its totient is φ = 12857144818.

The previous prime is 12857144801. The next prime is 12857144843. The reversal of 12857144819 is 91844175821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12857144819 - 2³² = 8562177523 is a prime.

It is a super-2 number, since 2×12857144819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12857144849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428572409 + 6428572410.

It is an arithmetic number, because the mean of its divisors is an integer number (6428572410).

Almost surely, 2^12857144819 is an apocalyptic number.

12857144819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12857144819 is an equidigital number, since it uses as much as digits as its factorization.

12857144819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 50.

The spelling of 12857144819 in words is "twelve billion, eight hundred fifty-seven million, one hundred forty-four thousand, eight hundred nineteen".