25904981863 has 2 divisors, whose sum is σ = 25904981864. Its totient is φ = 25904981862.

The previous prime is 25904981833. The next prime is 25904981867. The reversal of 25904981863 is 36818940952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25904981863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25904981867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12952490931 + 12952490932.

It is an arithmetic number, because the mean of its divisors is an integer number (12952490932).

Almost surely, 2^25904981863 is an apocalyptic number.

25904981863 is a deficient number, since it is larger than the sum of its proper divisors (1).

25904981863 is an equidigital number, since it uses as much as digits as its factorization.

25904981863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 25904981863 in words is "twenty-five billion, nine hundred four million, nine hundred eighty-one thousand, eight hundred sixty-three".