27778948712 has 32 divisors (see below), whose sum is σ = 52892454600. Its totient is φ = 13674968064.

The previous prime is 27778948697. The next prime is 27778948723. The reversal of 27778948712 is 21784987772.

It can be written as a sum of positive squares in 4 ways, for example, as 20797677796 + 6981270916 = 144214^2 + 83554^2 .

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, 290498 + ... + 374094.

Almost surely, 2^27778948712 is an apocalyptic number.

It is an amenable number.

27778948712 is a deficient number, since it is larger than the sum of its proper divisors (25113505888).

27778948712 is a wasteful number, since it uses less digits than its factorization.

27778948712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84245 (or 84241 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 62.

The spelling of 27778948712 in words is "twenty-seven billion, seven hundred seventy-eight million, nine hundred forty-eight thousand, seven hundred twelve".