25804357643 has 2 divisors, whose sum is σ = 25804357644. Its totient is φ = 25804357642.

The previous prime is 25804357633. The next prime is 25804357687. The reversal of 25804357643 is 34675340852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25804357643 - 2³² = 21509390347 is a prime.

It is not a weakly prime, because it can be changed into another prime (25804357633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902178821 + 12902178822.

It is an arithmetic number, because the mean of its divisors is an integer number (12902178822).

Almost surely, 2^25804357643 is an apocalyptic number.

25804357643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804357643 is an equidigital number, since it uses as much as digits as its factorization.

25804357643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 25804357643 in words is "twenty-five billion, eight hundred four million, three hundred fifty-seven thousand, six hundred forty-three".