27859456819 has 16 divisors (see below), whose sum is σ = 29570905600. Its totient is φ = 26173246176.

The previous prime is 27859456799. The next prime is 27859456853. The reversal of 27859456819 is 91865495872.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27859456819 - 2²¹ = 27857359667 is a prime.

It is a super-2 number, since 2×27859456819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27859459819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1424197 + ... + 1443625.

It is an arithmetic number, because the mean of its divisors is an integer number (1848181600).

Almost surely, 2^27859456819 is an apocalyptic number.

27859456819 is a deficient number, since it is larger than the sum of its proper divisors (1711448781).

27859456819 is a wasteful number, since it uses less digits than its factorization.

27859456819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20074.

The product of its digits is 43545600, while the sum is 64.

The spelling of 27859456819 in words is "twenty-seven billion, eight hundred fifty-nine million, four hundred fifty-six thousand, eight hundred nineteen".