25611779 has 2 divisors, whose sum is σ = 25611780. Its totient is φ = 25611778.

The previous prime is 25611769. The next prime is 25611799. The reversal of 25611779 is 97711652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25611779 - 2¹² = 25607683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25611749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12805889 + 12805890.

It is an arithmetic number, because the mean of its divisors is an integer number (12805890).

Almost surely, 2^25611779 is an apocalyptic number.

25611779 is a deficient number, since it is larger than the sum of its proper divisors (1).

25611779 is an equidigital number, since it uses as much as digits as its factorization.

25611779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 25611779 is about 5060.8081370469. The cubic root of 25611779 is about 294.7677152592.

The spelling of 25611779 in words is "twenty-five million, six hundred eleven thousand, seven hundred seventy-nine".