27800005825 has 12 divisors (see below), whose sum is σ = 34788267580. Its totient is φ = 22035965760.

The previous prime is 27800005817. The next prime is 27800005841. The reversal of 27800005825 is 52850000872.

It can be written as a sum of positive squares in 6 ways, for example, as 1602641089 + 26197364736 = 40033^2 + 161856^2 .

It is not a de Polignac number, because 27800005825 - 2³ = 27800005817 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 5098194 + ... + 5103643.

Almost surely, 2^27800005825 is an apocalyptic number.

27800005825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27800005825 is a deficient number, since it is larger than the sum of its proper divisors (6988261755).

27800005825 is a wasteful number, since it uses less digits than its factorization.

27800005825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201956 (or 10201951 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 27800005825 in words is "twenty-seven billion, eight hundred million, five thousand, eight hundred twenty-five".