27783944725 has 12 divisors (see below), whose sum is σ = 35383230244. Its totient is φ = 21626421120.

The previous prime is 27783944681. The next prime is 27783944743. The reversal of 27783944725 is 52744938772.

It can be written as a sum of positive squares in 6 ways, for example, as 4482838116 + 23301106609 = 66954^2 + 152647^2 .

It is not a de Polignac number, because 27783944725 - 2⁹ = 27783944213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27783944725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15017424 + ... + 15019273.

Almost surely, 2^27783944725 is an apocalyptic number.

27783944725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27783944725 is a deficient number, since it is larger than the sum of its proper divisors (7599285519).

27783944725 is a wasteful number, since it uses less digits than its factorization.

27783944725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30036744 (or 30036739 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 58.

The spelling of 27783944725 in words is "twenty-seven billion, seven hundred eighty-three million, nine hundred forty-four thousand, seven hundred twenty-five".