27780810108 has 24 divisors (see below), whose sum is σ = 64828117200. Its totient is φ = 9259380480.

The previous prime is 27780810091. The next prime is 27780810131. The reversal of 27780810108 is 80101808772.

It is a self number, because there is not a number n which added to its sum of digits gives 27780810108.

It is a congruent number.

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, 25668 + ... + 237108.

It is an arithmetic number, because the mean of its divisors is an integer number (2701171550).

Almost surely, 2^27780810108 is an apocalyptic number.

It is an amenable number.

27780810108 is an abundant number, since it is smaller than the sum of its proper divisors (37047307092).

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

27780810108 is a wasteful number, since it uses less digits than its factorization.

27780810108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222397 (or 222395 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 42.

The spelling of 27780810108 in words is "twenty-seven billion, seven hundred eighty million, eight hundred ten thousand, one hundred eight".