12857764487 has 2 divisors, whose sum is σ = 12857764488. Its totient is φ = 12857764486.

The previous prime is 12857764471. The next prime is 12857764571. The reversal of 12857764487 is 78446775821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12857764487 - 2⁴ = 12857764471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12857763487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428882243 + 6428882244.

It is an arithmetic number, because the mean of its divisors is an integer number (6428882244).

Almost surely, 2^12857764487 is an apocalyptic number.

12857764487 is a deficient number, since it is larger than the sum of its proper divisors (1).

12857764487 is an equidigital number, since it uses as much as digits as its factorization.

12857764487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21073920, while the sum is 59.

The spelling of 12857764487 in words is "twelve billion, eight hundred fifty-seven million, seven hundred sixty-four thousand, four hundred eighty-seven".