27798442713 has 6 divisors (see below), whose sum is σ = 40153306154. Its totient is φ = 18532295136.

The previous prime is 27798442709. The next prime is 27798442741. The reversal of 27798442713 is 31724489772.

It can be written as a sum of positive squares in only one way, i.e., 19084593609 + 8713849104 = 138147^2 + 93348^2 .

It is not a de Polignac number, because 27798442713 - 2² = 27798442709 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 27798442713.

It is not an unprimeable number, because it can be changed into a prime (27798442013) 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 5 ways as a sum of consecutive naturals, for example, 1544357920 + ... + 1544357937.

Almost surely, 2^27798442713 is an apocalyptic number.

It is an amenable number.

27798442713 is a deficient number, since it is larger than the sum of its proper divisors (12354863441).

27798442713 is a wasteful number, since it uses less digits than its factorization.

27798442713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088715863 (or 3088715860 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 27798442713 in words is "twenty-seven billion, seven hundred ninety-eight million, four hundred forty-two thousand, seven hundred thirteen".