27976946879 has 4 divisors (see below), whose sum is σ = 31973653584. Its totient is φ = 23980240176.

The previous prime is 27976946843. The next prime is 27976946911. The reversal of 27976946879 is 97864967972.

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

It is a cyclic number.

It is not a de Polignac number, because 27976946879 - 2¹⁶ = 27976881343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27976946779) 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 3 ways as a sum of consecutive naturals, for example, 1998353342 + ... + 1998353355.

It is an arithmetic number, because the mean of its divisors is an integer number (7993413396).

Almost surely, 2^27976946879 is an apocalyptic number.

27976946879 is a deficient number, since it is larger than the sum of its proper divisors (3996706705).

27976946879 is an equidigital number, since it uses as much as digits as its factorization.

27976946879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996706704.

The product of its digits is 576108288, while the sum is 74.

The spelling of 27976946879 in words is "twenty-seven billion, nine hundred seventy-six million, nine hundred forty-six thousand, eight hundred seventy-nine".