12805007287 has 2 divisors, whose sum is σ = 12805007288. Its totient is φ = 12805007286.

The previous prime is 12805007233. The next prime is 12805007353. The reversal of 12805007287 is 78270050821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12805007287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12805007227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402503643 + 6402503644.

It is an arithmetic number, because the mean of its divisors is an integer number (6402503644).

Almost surely, 2^12805007287 is an apocalyptic number.

12805007287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12805007287 is an equidigital number, since it uses as much as digits as its factorization.

12805007287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The spelling of 12805007287 in words is "twelve billion, eight hundred five million, seven thousand, two hundred eighty-seven".