25680911 has 2 divisors, whose sum is σ = 25680912. Its totient is φ = 25680910.

The previous prime is 25680901. The next prime is 25680937. The reversal of 25680911 is 11908652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25680911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25680901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840455 + 12840456.

It is an arithmetic number, because the mean of its divisors is an integer number (12840456).

Almost surely, 2^25680911 is an apocalyptic number.

25680911 is a deficient number, since it is larger than the sum of its proper divisors (1).

25680911 is an equidigital number, since it uses as much as digits as its factorization.

25680911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 25680911 is about 5067.6336686860. The cubic root of 25680911 is about 295.0326919625.

The spelling of 25680911 in words is "twenty-five million, six hundred eighty thousand, nine hundred eleven".