25719042887 has 2 divisors, whose sum is σ = 25719042888. Its totient is φ = 25719042886.

The previous prime is 25719042859. The next prime is 25719042901. The reversal of 25719042887 is 78824091752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25719042887 - 2¹² = 25719038791 is a prime.

It is a super-2 number, since 2×25719042887² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25719042847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859521443 + 12859521444.

It is an arithmetic number, because the mean of its divisors is an integer number (12859521444).

Almost surely, 2^25719042887 is an apocalyptic number.

25719042887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719042887 is an equidigital number, since it uses as much as digits as its factorization.

25719042887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 25719042887 in words is "twenty-five billion, seven hundred nineteen million, forty-two thousand, eight hundred eighty-seven".