8255777825 has 6 divisors (see below), whose sum is σ = 10237164534. Its totient is φ = 6604622240.

The previous prime is 8255777821. The next prime is 8255777863. The reversal of 8255777825 is 5287775528.

It can be written as a sum of positive squares in 3 ways, for example, as 1852097296 + 6403680529 = 43036^2 + 80023^2 .

It is not a de Polignac number, because 8255777825 - 2² = 8255777821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8255777821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165115532 + ... + 165115581.

It is an arithmetic number, because the mean of its divisors is an integer number (1706194089).

Almost surely, 2^8255777825 is an apocalyptic number.

It is an amenable number.

8255777825 is a deficient number, since it is larger than the sum of its proper divisors (1981386709).

8255777825 is a wasteful number, since it uses less digits than its factorization.

8255777825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330231123 (or 330231118 counting only the distinct ones).

The product of its digits is 10976000, while the sum is 56.

The square root of 8255777825 is about 90861.3109359534. The cubic root of 8255777825 is about 2021.0916088736.

The spelling of 8255777825 in words is "eight billion, two hundred fifty-five million, seven hundred seventy-seven thousand, eight hundred twenty-five".