2778356768 has 48 divisors (see below), whose sum is σ = 5971462560. Its totient is φ = 1261977600.

The previous prime is 2778356761. The next prime is 2778356821. The reversal of 2778356768 is 8676538772.

It is not an unprimeable number, because it can be changed into a prime (2778356761) 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 7 ways as a sum of consecutive naturals, for example, 832928 + ... + 836256.

It is an arithmetic number, because the mean of its divisors is an integer number (124405470).

Almost surely, 2^2778356768 is an apocalyptic number.

It is an amenable number.

2778356768 is an abundant number, since it is smaller than the sum of its proper divisors (3193105792).

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

2778356768 is a wasteful number, since it uses less digits than its factorization.

2778356768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721 (or 5713 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 59.

The square root of 2778356768 is about 52710.1201668143. The cubic root of 2778356768 is about 1405.8187699044.

The spelling of 2778356768 in words is "two billion, seven hundred seventy-eight million, three hundred fifty-six thousand, seven hundred sixty-eight".