25804627249 has 2 divisors, whose sum is σ = 25804627250. Its totient is φ = 25804627248.

The previous prime is 25804627171. The next prime is 25804627253. The reversal of 25804627249 is 94272640852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24439694224 + 1364933025 = 156332^2 + 36945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25804627249 is a prime.

It is not a weakly prime, because it can be changed into another prime (25804627279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902313624 + 12902313625.

It is an arithmetic number, because the mean of its divisors is an integer number (12902313625).

Almost surely, 2^25804627249 is an apocalyptic number.

It is an amenable number.

25804627249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804627249 is an equidigital number, since it uses as much as digits as its factorization.

25804627249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 25804627249 in words is "twenty-five billion, eight hundred four million, six hundred twenty-seven thousand, two hundred forty-nine".