27665227912 has 96 divisors (see below), whose sum is σ = 61477099200. Its totient is φ = 11634102144.

The previous prime is 27665227901. The next prime is 27665227927. The reversal of 27665227912 is 21972256672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22364158 + ... + 22365394.

It is an arithmetic number, because the mean of its divisors is an integer number (640386450).

Almost surely, 2^27665227912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27665227912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30738549600).

27665227912 is an abundant number, since it is smaller than the sum of its proper divisors (33811871288).

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

27665227912 is a wasteful number, since it uses less digits than its factorization.

27665227912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283 (or 2272 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 27665227912 in words is "twenty-seven billion, six hundred sixty-five million, two hundred twenty-seven thousand, nine hundred twelve".