25776692749 has 2 divisors, whose sum is σ = 25776692750. Its totient is φ = 25776692748.

The previous prime is 25776692657. The next prime is 25776692783. The reversal of 25776692749 is 94729667752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20903954724 + 4872738025 = 144582^2 + 69805^2 .

It is a cyclic number.

It is not a de Polignac number, because 25776692749 - 2⁷ = 25776692621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25776690749) 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, 12888346374 + 12888346375.

It is an arithmetic number, because the mean of its divisors is an integer number (12888346375).

Almost surely, 2^25776692749 is an apocalyptic number.

It is an amenable number.

25776692749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25776692749 is an equidigital number, since it uses as much as digits as its factorization.

25776692749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 64.

The spelling of 25776692749 in words is "twenty-five billion, seven hundred seventy-six million, six hundred ninety-two thousand, seven hundred forty-nine".