27135249857 has 4 divisors (see below), whose sum is σ = 27221944260. Its totient is φ = 27048555456.

The previous prime is 27135249853. The next prime is 27135249863. The reversal of 27135249857 is 75894253172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13967457856 + 13167792001 = 118184^2 + 114751^2 .

It is a cyclic number.

It is not a de Polignac number, because 27135249857 - 2² = 27135249853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27135249799 and 27135249808.

It is not an unprimeable number, because it can be changed into a prime (27135249853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43346732 + ... + 43347357.

It is an arithmetic number, because the mean of its divisors is an integer number (6805486065).

Almost surely, 2^27135249857 is an apocalyptic number.

It is an amenable number.

27135249857 is a deficient number, since it is larger than the sum of its proper divisors (86694403).

27135249857 is an equidigital number, since it uses as much as digits as its factorization.

27135249857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86694402.

The product of its digits is 4233600, while the sum is 53.

The spelling of 27135249857 in words is "twenty-seven billion, one hundred thirty-five million, two hundred forty-nine thousand, eight hundred fifty-seven".