25428043591 has 2 divisors, whose sum is σ = 25428043592. Its totient is φ = 25428043590.

The previous prime is 25428043579. The next prime is 25428043609. The reversal of 25428043591 is 19534082452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25428043591 - 2⁵ = 25428043559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25428043561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12714021795 + 12714021796.

It is an arithmetic number, because the mean of its divisors is an integer number (12714021796).

Almost surely, 2^25428043591 is an apocalyptic number.

25428043591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428043591 is an equidigital number, since it uses as much as digits as its factorization.

25428043591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 25428043591 in words is "twenty-five billion, four hundred twenty-eight million, forty-three thousand, five hundred ninety-one".