25674888409 has 2 divisors, whose sum is σ = 25674888410. Its totient is φ = 25674888408.

The previous prime is 25674888359. The next prime is 25674888419. The reversal of 25674888409 is 90488847652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21895712784 + 3779175625 = 147972^2 + 61475^2 .

It is a cyclic number.

It is not a de Polignac number, because 25674888409 - 2⁹ = 25674887897 is a prime.

It is not a weakly prime, because it can be changed into another prime (25674888419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12837444204 + 12837444205.

It is an arithmetic number, because the mean of its divisors is an integer number (12837444205).

Almost surely, 2^25674888409 is an apocalyptic number.

It is an amenable number.

25674888409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25674888409 is an equidigital number, since it uses as much as digits as its factorization.

25674888409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 25674888409 in words is "twenty-five billion, six hundred seventy-four million, eight hundred eighty-eight thousand, four hundred nine".