25511779 has 2 divisors, whose sum is σ = 25511780. Its totient is φ = 25511778.

The previous prime is 25511753. The next prime is 25511797. The reversal of 25511779 is 97711552.

Together with next prime (25511797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25511779 - 2⁹ = 25511267 is a prime.

It is not a weakly prime, because it can be changed into another prime (25511719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755889 + 12755890.

It is an arithmetic number, because the mean of its divisors is an integer number (12755890).

Almost surely, 2^25511779 is an apocalyptic number.

25511779 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511779 is an equidigital number, since it uses as much as digits as its factorization.

25511779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 37.

The square root of 25511779 is about 5050.9186293188. The cubic root of 25511779 is about 294.3835792656.

The spelling of 25511779 in words is "twenty-five million, five hundred eleven thousand, seven hundred seventy-nine".