27791987712 has 44 divisors (see below), whose sum is σ = 74075787936. Its totient is φ = 9263994880.

The previous prime is 27791987683. The next prime is 27791987789. The reversal of 27791987712 is 21778919772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4520364 + ... + 4526507.

Almost surely, 2^27791987712 is an apocalyptic number.

It is an amenable number.

27791987712 is an abundant number, since it is smaller than the sum of its proper divisors (46283800224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27791987712 is an equidigital number, since it uses as much as digits as its factorization.

27791987712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9046894 (or 9046876 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 60.

The spelling of 27791987712 in words is "twenty-seven billion, seven hundred ninety-one million, nine hundred eighty-seven thousand, seven hundred twelve".