25263887659 has 2 divisors, whose sum is σ = 25263887660. Its totient is φ = 25263887658.

The previous prime is 25263887639. The next prime is 25263887683. The reversal of 25263887659 is 95678836252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25263887659 - 2⁷ = 25263887531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25263887597 and 25263887606.

It is not a weakly prime, because it can be changed into another prime (25263887609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631943829 + 12631943830.

It is an arithmetic number, because the mean of its divisors is an integer number (12631943830).

Almost surely, 2^25263887659 is an apocalyptic number.

25263887659 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263887659 is an equidigital number, since it uses as much as digits as its factorization.

25263887659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43545600, while the sum is 61.

The spelling of 25263887659 in words is "twenty-five billion, two hundred sixty-three million, eight hundred eighty-seven thousand, six hundred fifty-nine".