2777775052778 has 12 divisors (see below), whose sum is σ = 4579885314690. Its totient is φ = 1262625023880.

The previous prime is 2777775052777. The next prime is 2777775052781. The reversal of 2777775052778 is 8772505777772.

It can be written as a sum of positive squares in only one way, i.e., 1700345584729 + 1077429468049 = 1303973^2 + 1037993^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2777775052771) 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, 5739204413 + ... + 5739204896.

Almost surely, 2^{2777775052778} is an apocalyptic number.

2777775052778 is a deficient number, since it is larger than the sum of its proper divisors (1802110261912).

2777775052778 is a wasteful number, since it uses less digits than its factorization.

2777775052778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478409333 (or 11478409322 counting only the distinct ones).

The product of its (nonzero) digits is 658834400, while the sum is 71.

The spelling of 2777775052778 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-five million, fifty-two thousand, seven hundred seventy-eight".