25368866503 has 2 divisors, whose sum is σ = 25368866504. Its totient is φ = 25368866502.

The previous prime is 25368866489. The next prime is 25368866609. The reversal of 25368866503 is 30566886352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25368866503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25368864503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12684433251 + 12684433252.

It is an arithmetic number, because the mean of its divisors is an integer number (12684433252).

Almost surely, 2^25368866503 is an apocalyptic number.

25368866503 is a deficient number, since it is larger than the sum of its proper divisors (1).

25368866503 is an equidigital number, since it uses as much as digits as its factorization.

25368866503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 25368866503 in words is "twenty-five billion, three hundred sixty-eight million, eight hundred sixty-six thousand, five hundred three".