25663868683 has 2 divisors, whose sum is σ = 25663868684. Its totient is φ = 25663868682.

The previous prime is 25663868677. The next prime is 25663868707. The reversal of 25663868683 is 38686836652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25663868683 - 2¹⁷ = 25663737611 is a prime.

It is not a weakly prime, because it can be changed into another prime (25663868983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12831934341 + 12831934342.

It is an arithmetic number, because the mean of its divisors is an integer number (12831934342).

Almost surely, 2^25663868683 is an apocalyptic number.

25663868683 is a deficient number, since it is larger than the sum of its proper divisors (1).

25663868683 is an equidigital number, since it uses as much as digits as its factorization.

25663868683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59719680, while the sum is 61.

The spelling of 25663868683 in words is "twenty-five billion, six hundred sixty-three million, eight hundred sixty-eight thousand, six hundred eighty-three".