25783966823567 has 2 divisors, whose sum is σ = 25783966823568. Its totient is φ = 25783966823566.

The previous prime is 25783966823557. The next prime is 25783966823581. The reversal of 25783966823567 is 76532866938752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25783966823567 - 2³⁴ = 25766786954383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25783966823557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12891983411783 + 12891983411784.

It is an arithmetic number, because the mean of its divisors is an integer number (12891983411784).

Almost surely, 2^{25783966823567} is an apocalyptic number.

25783966823567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25783966823567 is an equidigital number, since it uses as much as digits as its factorization.

25783966823567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5486745600, while the sum is 77.

The spelling of 25783966823567 in words is "twenty-five trillion, seven hundred eighty-three billion, nine hundred sixty-six million, eight hundred twenty-three thousand, five hundred sixty-seven".