2778086725 has 12 divisors (see below), whose sum is σ = 3537932164. Its totient is φ = 2162401920.

The previous prime is 2778086723. The next prime is 2778086737. The reversal of 2778086725 is 5276808772.

2778086725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 4800481 + 2773286244 = 2191^2 + 52662^2 .

It is not a de Polignac number, because 2778086725 - 2¹ = 2778086723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778086723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1500744 + ... + 1502593.

Almost surely, 2^2778086725 is an apocalyptic number.

2778086725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2778086725 is a deficient number, since it is larger than the sum of its proper divisors (759845439).

2778086725 is a wasteful number, since it uses less digits than its factorization.

2778086725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003384 (or 3003379 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 52.

The square root of 2778086725 is about 52707.5585186793. The cubic root of 2778086725 is about 1405.7732221401.

The spelling of 2778086725 in words is "two billion, seven hundred seventy-eight million, eighty-six thousand, seven hundred twenty-five".