25803878413 has 2 divisors, whose sum is σ = 25803878414. Its totient is φ = 25803878412.

The previous prime is 25803878381. The next prime is 25803878447. The reversal of 25803878413 is 31487830852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25289586729 + 514291684 = 159027^2 + 22678^2 .

It is a cyclic number.

It is not a de Polignac number, because 25803878413 - 2⁵ = 25803878381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25803878483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901939206 + 12901939207.

It is an arithmetic number, because the mean of its divisors is an integer number (12901939207).

Almost surely, 2^25803878413 is an apocalyptic number.

It is an amenable number.

25803878413 is a deficient number, since it is larger than the sum of its proper divisors (1).

25803878413 is an equidigital number, since it uses as much as digits as its factorization.

25803878413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 25803878413 in words is "twenty-five billion, eight hundred three million, eight hundred seventy-eight thousand, four hundred thirteen".