25862325809 has 2 divisors, whose sum is σ = 25862325810. Its totient is φ = 25862325808.

The previous prime is 25862325803. The next prime is 25862325829. The reversal of 25862325809 is 90852326852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24909677584 + 952648225 = 157828^2 + 30865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25862325809 is a prime.

It is not a weakly prime, because it can be changed into another prime (25862325803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12931162904 + 12931162905.

It is an arithmetic number, because the mean of its divisors is an integer number (12931162905).

Almost surely, 2^25862325809 is an apocalyptic number.

It is an amenable number.

25862325809 is a deficient number, since it is larger than the sum of its proper divisors (1).

25862325809 is an equidigital number, since it uses as much as digits as its factorization.

25862325809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 25862325809 in words is "twenty-five billion, eight hundred sixty-two million, three hundred twenty-five thousand, eight hundred nine".