27806769125 has 8 divisors (see below), whose sum is σ = 34702848024. Its totient is φ = 22245415200.

The previous prime is 27806769091. The next prime is 27806769127. The reversal of 27806769125 is 52196760872.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 27806563009 = 454^2 + 166753^2 .

It is not a de Polignac number, because 27806769125 - 2⁶ = 27806769061 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 (27806769127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111226952 + ... + 111227201.

It is an arithmetic number, because the mean of its divisors is an integer number (4337856003).

Almost surely, 2^27806769125 is an apocalyptic number.

27806769125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27806769125 is a deficient number, since it is larger than the sum of its proper divisors (6896078899).

27806769125 is an equidigital number, since it uses as much as digits as its factorization.

27806769125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222454168 (or 222454158 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 27806769125 in words is "twenty-seven billion, eight hundred six million, seven hundred sixty-nine thousand, one hundred twenty-five".