25930748309 has 2 divisors, whose sum is σ = 25930748310. Its totient is φ = 25930748308.

The previous prime is 25930748279. The next prime is 25930748317. The reversal of 25930748309 is 90384703952.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24464088100 + 1466660209 = 156410^2 + 38297^2 .

It is a cyclic number.

It is not a de Polignac number, because 25930748309 - 2¹⁶ = 25930682773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25930718309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12965374154 + 12965374155.

It is an arithmetic number, because the mean of its divisors is an integer number (12965374155).

Almost surely, 2^25930748309 is an apocalyptic number.

It is an amenable number.

25930748309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25930748309 is an equidigital number, since it uses as much as digits as its factorization.

25930748309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 25930748309 in words is "twenty-five billion, nine hundred thirty million, seven hundred forty-eight thousand, three hundred nine".