25996079777 has 2 divisors, whose sum is σ = 25996079778. Its totient is φ = 25996079776.

The previous prime is 25996079743. The next prime is 25996079783. The reversal of 25996079777 is 77797069952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25625286241 + 370793536 = 160079^2 + 19256^2 .

It is a cyclic number.

It is not a de Polignac number, because 25996079777 - 2¹⁴ = 25996063393 is a prime.

It is not a weakly prime, because it can be changed into another prime (25996079477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12998039888 + 12998039889.

It is an arithmetic number, because the mean of its divisors is an integer number (12998039889).

Almost surely, 2^25996079777 is an apocalyptic number.

It is an amenable number.

25996079777 is a deficient number, since it is larger than the sum of its proper divisors (1).

25996079777 is an equidigital number, since it uses as much as digits as its factorization.

25996079777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105019740, while the sum is 68.

The spelling of 25996079777 in words is "twenty-five billion, nine hundred ninety-six million, seventy-nine thousand, seven hundred seventy-seven".