25680757 has 2 divisors, whose sum is σ = 25680758. Its totient is φ = 25680756.

The previous prime is 25680731. The next prime is 25680763. The reversal of 25680757 is 75708652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25492401 + 188356 = 5049^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 25680757 - 2¹⁵ = 25647989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25620757) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840378 + 12840379.

It is an arithmetic number, because the mean of its divisors is an integer number (12840379).

Almost surely, 2^25680757 is an apocalyptic number.

It is an amenable number.

25680757 is a deficient number, since it is larger than the sum of its proper divisors (1).

25680757 is an equidigital number, since it uses as much as digits as its factorization.

25680757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 25680757 is about 5067.6184741948. The cubic root of 25680757 is about 295.0321022232.

The spelling of 25680757 in words is "twenty-five million, six hundred eighty thousand, seven hundred fifty-seven".