27765468378 has 12 divisors (see below), whose sum is σ = 60158514858. Its totient is φ = 9255156120.

The previous prime is 27765468377. The next prime is 27765468391. The reversal of 27765468378 is 87386456772.

27765468378 is a `hidden beast` number, since 2 + 7 + 7 + 6 + 546 + 83 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27362783889 + 402684489 = 165417^2 + 20067^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27765468377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771262993 + ... + 771263028.

Almost surely, 2^27765468378 is an apocalyptic number.

27765468378 is an abundant number, since it is smaller than the sum of its proper divisors (32393046480).

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

27765468378 is a wasteful number, since it uses less digits than its factorization.

27765468378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542526029 (or 1542526026 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 63.

The spelling of 27765468378 in words is "twenty-seven billion, seven hundred sixty-five million, four hundred sixty-eight thousand, three hundred seventy-eight".