27985663442 has 16 divisors (see below), whose sum is σ = 45797508000. Its totient is φ = 12719982240.

The previous prime is 27985663439. The next prime is 27985663451. The reversal of 27985663442 is 24436658972.

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, 494309 + ... + 548007.

It is an arithmetic number, because the mean of its divisors is an integer number (2862344250).

Almost surely, 2^27985663442 is an apocalyptic number.

27985663442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

27985663442 is a deficient number, since it is larger than the sum of its proper divisors (17811844558).

27985663442 is a wasteful number, since it uses less digits than its factorization.

27985663442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77401.

The product of its digits is 17418240, while the sum is 56.

The spelling of 27985663442 in words is "twenty-seven billion, nine hundred eighty-five million, six hundred sixty-three thousand, four hundred forty-two".