25927050209 has 2 divisors, whose sum is σ = 25927050210. Its totient is φ = 25927050208.

The previous prime is 25927050197. The next prime is 25927050241. The reversal of 25927050209 is 90205072952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16944749584 + 8982300625 = 130172^2 + 94775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25927050209 is a prime.

It is not a weakly prime, because it can be changed into another prime (25927059209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12963525104 + 12963525105.

It is an arithmetic number, because the mean of its divisors is an integer number (12963525105).

Almost surely, 2^25927050209 is an apocalyptic number.

It is an amenable number.

25927050209 is a deficient number, since it is larger than the sum of its proper divisors (1).

25927050209 is an equidigital number, since it uses as much as digits as its factorization.

25927050209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 25927050209 in words is "twenty-five billion, nine hundred twenty-seven million, fifty thousand, two hundred nine".