28256814679 has 2 divisors, whose sum is σ = 28256814680. Its totient is φ = 28256814678.

The previous prime is 28256814659. The next prime is 28256814737. The reversal of 28256814679 is 97641865282.

It is an a-pointer prime, because the next prime (28256814737) can be obtained adding 28256814679 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28256814679 - 2⁵ = 28256814647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28256814629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14128407339 + 14128407340.

It is an arithmetic number, because the mean of its divisors is an integer number (14128407340).

Almost surely, 2^28256814679 is an apocalyptic number.

28256814679 is a deficient number, since it is larger than the sum of its proper divisors (1).

28256814679 is an equidigital number, since it uses as much as digits as its factorization.

28256814679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 58.

The spelling of 28256814679 in words is "twenty-eight billion, two hundred fifty-six million, eight hundred fourteen thousand, six hundred seventy-nine".