25577791 has 2 divisors, whose sum is σ = 25577792. Its totient is φ = 25577790.

The previous prime is 25577789. The next prime is 25577801. The reversal of 25577791 is 19777552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25577791 - 2¹ = 25577789 is a prime.

Together with 25577789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25577701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788895 + 12788896.

It is an arithmetic number, because the mean of its divisors is an integer number (12788896).

Almost surely, 2^25577791 is an apocalyptic number.

25577791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25577791 is an equidigital number, since it uses as much as digits as its factorization.

25577791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154350, while the sum is 43.

The square root of 25577791 is about 5057.4490605443. The cubic root of 25577791 is about 294.6372674670.

The spelling of 25577791 in words is "twenty-five million, five hundred seventy-seven thousand, seven hundred ninety-one".