27983978851143 has 24 divisors (see below), whose sum is σ = 43404078388080. Its totient is φ = 15990713867520.

The previous prime is 27983978851117. The next prime is 27983978851189. The reversal of 27983978851143 is 34115887938972.

It is not a de Polignac number, because 27983978851143 - 2¹² = 27983978847047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27983978852143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18875103 + ... + 20303631.

It is an arithmetic number, because the mean of its divisors is an integer number (1808503266170).

Almost surely, 2^{27983978851143} is an apocalyptic number.

27983978851143 is a deficient number, since it is larger than the sum of its proper divisors (15420099536937).

27983978851143 is a wasteful number, since it uses less digits than its factorization.

27983978851143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561807 (or 1561800 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 75.

The spelling of 27983978851143 in words is "twenty-seven trillion, nine hundred eighty-three billion, nine hundred seventy-eight million, eight hundred fifty-one thousand, one hundred forty-three".