25161611 has 2 divisors, whose sum is σ = 25161612. Its totient is φ = 25161610.

The previous prime is 25161593. The next prime is 25161613. The reversal of 25161611 is 11616152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25161611 - 2¹⁸ = 24899467 is a prime.

It is a Sophie Germain prime.

Together with 25161613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25161613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12580805 + 12580806.

It is an arithmetic number, because the mean of its divisors is an integer number (12580806).

Almost surely, 2^25161611 is an apocalyptic number.

25161611 is a deficient number, since it is larger than the sum of its proper divisors (1).

25161611 is an equidigital number, since it uses as much as digits as its factorization.

25161611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 25161611 is about 5016.1350659646. The cubic root of 25161611 is about 293.0304922313.

Adding to 25161611 its reverse (11616152), we get a palindrome (36777763).

The spelling of 25161611 in words is "twenty-five million, one hundred sixty-one thousand, six hundred eleven".