25650681247 has 2 divisors, whose sum is σ = 25650681248. Its totient is φ = 25650681246.

The previous prime is 25650681239. The next prime is 25650681269. The reversal of 25650681247 is 74218605652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25650681247 - 2³ = 25650681239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25650681197 and 25650681206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25650681547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825340623 + 12825340624.

It is an arithmetic number, because the mean of its divisors is an integer number (12825340624).

Almost surely, 2^25650681247 is an apocalyptic number.

25650681247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25650681247 is an equidigital number, since it uses as much as digits as its factorization.

25650681247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 25650681247 in words is "twenty-five billion, six hundred fifty million, six hundred eighty-one thousand, two hundred forty-seven".