25257678871 has 2 divisors, whose sum is σ = 25257678872. Its totient is φ = 25257678870.

The previous prime is 25257678869. The next prime is 25257678907. The reversal of 25257678871 is 17887675252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25257678871 - 2¹ = 25257678869 is a prime.

Together with 25257678869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25257678571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628839435 + 12628839436.

It is an arithmetic number, because the mean of its divisors is an integer number (12628839436).

Almost surely, 2^25257678871 is an apocalyptic number.

25257678871 is a deficient number, since it is larger than the sum of its proper divisors (1).

25257678871 is an equidigital number, since it uses as much as digits as its factorization.

25257678871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13171200, while the sum is 58.

The spelling of 25257678871 in words is "twenty-five billion, two hundred fifty-seven million, six hundred seventy-eight thousand, eight hundred seventy-one".