25071045691 has 2 divisors, whose sum is σ = 25071045692. Its totient is φ = 25071045690.

The previous prime is 25071045677. The next prime is 25071045707. The reversal of 25071045691 is 19654017052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25071045691 - 2⁷ = 25071045563 is a prime.

It is not a weakly prime, because it can be changed into another prime (25071045611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535522845 + 12535522846.

It is an arithmetic number, because the mean of its divisors is an integer number (12535522846).

Almost surely, 2^25071045691 is an apocalyptic number.

25071045691 is a deficient number, since it is larger than the sum of its proper divisors (1).

25071045691 is an equidigital number, since it uses as much as digits as its factorization.

25071045691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 25071045691 in words is "twenty-five billion, seventy-one million, forty-five thousand, six hundred ninety-one".