27781321924 has 12 divisors (see below), whose sum is σ = 48658279824. Its totient is φ = 13878956264.

The previous prime is 27781321901. The next prime is 27781321969. The reversal of 27781321924 is 42912318772.

It is an unprimeable number.

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, 2920834 + ... + 2930329.

It is an arithmetic number, because the mean of its divisors is an integer number (4054856652).

Almost surely, 2^27781321924 is an apocalyptic number.

It is an amenable number.

27781321924 is a deficient number, since it is larger than the sum of its proper divisors (20876957900).

27781321924 is a wasteful number, since it uses less digits than its factorization.

27781321924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852354 (or 5852352 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 27781321924 in words is "twenty-seven billion, seven hundred eighty-one million, three hundred twenty-one thousand, nine hundred twenty-four".