2777777776 has 20 divisors (see below), whose sum is σ = 5450072800. Its totient is φ = 1371307392.

The previous prime is 2777777759. The next prime is 2777777777. The reversal of 2777777776 is 6777777772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2777777777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097541 + ... + 1100068.

It is an arithmetic number, because the mean of its divisors is an integer number (272503640).

Almost surely, 2^2777777776 is an apocalyptic number.

It is an amenable number.

2777777776 is a deficient number, since it is larger than the sum of its proper divisors (2672295024).

2777777776 is a wasteful number, since it uses less digits than its factorization.

2777777776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197696 (or 2197690 counting only the distinct ones).

The product of its digits is 69177612, while the sum is 64.

The square root of 2777777776 is about 52704.6276526075. The cubic root of 2777777776 is about 1405.7211085364.

The spelling of 2777777776 in words is "two billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred seventy-six".