27983774842 has 16 divisors (see below), whose sum is σ = 42904287360. Its totient is φ = 13685656608.

The previous prime is 27983774821. The next prime is 27983774867. The reversal of 27983774842 is 24847738972.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810723 + ... + 844534.

It is an arithmetic number, because the mean of its divisors is an integer number (2681517960).

Almost surely, 2^27983774842 is an apocalyptic number.

27983774842 is a deficient number, since it is larger than the sum of its proper divisors (14920512518).

27983774842 is a wasteful number, since it uses less digits than its factorization.

27983774842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655445.

The product of its digits is 37933056, while the sum is 61.

The spelling of 27983774842 in words is "twenty-seven billion, nine hundred eighty-three million, seven hundred seventy-four thousand, eight hundred forty-two".