25777720579 has 6 divisors (see below), whose sum is σ = 27913153236. Its totient is φ = 23794818840.

The previous prime is 25777720559. The next prime is 25777720607. The reversal of 25777720579 is 97502777752.

It is not a de Polignac number, because 25777720579 - 2¹⁵ = 25777687811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25777720559) 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 in 5 ways as a sum of consecutive naturals, for example, 76265277 + ... + 76265614.

It is an arithmetic number, because the mean of its divisors is an integer number (4652192206).

Almost surely, 2^25777720579 is an apocalyptic number.

25777720579 is a deficient number, since it is larger than the sum of its proper divisors (2135432657).

25777720579 is a wasteful number, since it uses less digits than its factorization.

25777720579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152530917 (or 152530904 counting only the distinct ones).

The product of its (nonzero) digits is 15126300, while the sum is 58.

The spelling of 25777720579 in words is "twenty-five billion, seven hundred seventy-seven million, seven hundred twenty thousand, five hundred seventy-nine".