25868715787 has 2 divisors, whose sum is σ = 25868715788. Its totient is φ = 25868715786.

The previous prime is 25868715773. The next prime is 25868715827. The reversal of 25868715787 is 78751786852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25868715787 - 2²³ = 25860327179 is a prime.

It is not a weakly prime, because it can be changed into another prime (25868715757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12934357893 + 12934357894.

It is an arithmetic number, because the mean of its divisors is an integer number (12934357894).

Almost surely, 2^25868715787 is an apocalyptic number.

25868715787 is a deficient number, since it is larger than the sum of its proper divisors (1).

25868715787 is an equidigital number, since it uses as much as digits as its factorization.

25868715787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52684800, while the sum is 64.

The spelling of 25868715787 in words is "twenty-five billion, eight hundred sixty-eight million, seven hundred fifteen thousand, seven hundred eighty-seven".