27775022778 has 48 divisors (see below), whose sum is σ = 62954251776. Its totient is φ = 8833445280.

The previous prime is 27775022771. The next prime is 27775022813. The reversal of 27775022778 is 87722057772.

27775022778 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27775022771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79863 + ... + 248853.

It is an arithmetic number, because the mean of its divisors is an integer number (1311546912).

Almost surely, 2^27775022778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27775022778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31477125888).

27775022778 is an abundant number, since it is smaller than the sum of its proper divisors (35179228998).

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

27775022778 is a wasteful number, since it uses less digits than its factorization.

27775022778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169419 (or 169416 counting only the distinct ones).

The product of its (nonzero) digits is 5378240, while the sum is 54.

The spelling of 27775022778 in words is "twenty-seven billion, seven hundred seventy-five million, twenty-two thousand, seven hundred seventy-eight".