27776750778 has 96 divisors (see below), whose sum is σ = 70719143040. Its totient is φ = 7713014400.

The previous prime is 27776750777. The next prime is 27776750849. The reversal of 27776750778 is 87705767772.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (27776750777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4896928 + ... + 4902596.

It is an arithmetic number, because the mean of its divisors is an integer number (736657740).

Almost surely, 2^27776750778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27776750778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35359571520).

27776750778 is an abundant number, since it is smaller than the sum of its proper divisors (42942392262).

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

27776750778 is a wasteful number, since it uses less digits than its factorization.

27776750778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772 (or 6769 counting only the distinct ones).

The product of its (nonzero) digits is 56471520, while the sum is 63.

The spelling of 27776750778 in words is "twenty-seven billion, seven hundred seventy-six million, seven hundred fifty thousand, seven hundred seventy-eight".