25840403867 has 2 divisors, whose sum is σ = 25840403868. Its totient is φ = 25840403866.

The previous prime is 25840403851. The next prime is 25840403891. The reversal of 25840403867 is 76830404852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25840403867 - 2⁴ = 25840403851 is a prime.

It is not a weakly prime, because it can be changed into another prime (25840433867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12920201933 + 12920201934.

It is an arithmetic number, because the mean of its divisors is an integer number (12920201934).

Almost surely, 2^25840403867 is an apocalyptic number.

25840403867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25840403867 is an equidigital number, since it uses as much as digits as its factorization.

25840403867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 25840403867 in words is "twenty-five billion, eight hundred forty million, four hundred three thousand, eight hundred sixty-seven".