2779944778 has 16 divisors (see below), whose sum is σ = 4635542016. Its totient is φ = 1241662320.

The previous prime is 2779944773. The next prime is 2779944781. The reversal of 2779944778 is 8774499772.

2779944778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2779944773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1723726 + ... + 1725337.

It is an arithmetic number, because the mean of its divisors is an integer number (289721376).

Almost surely, 2^2779944778 is an apocalyptic number.

2779944778 is a deficient number, since it is larger than the sum of its proper divisors (1855597238).

2779944778 is a wasteful number, since it uses less digits than its factorization.

2779944778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449109.

The product of its digits is 49787136, while the sum is 64.

The square root of 2779944778 is about 52725.1816307919. The cubic root of 2779944778 is about 1406.0865575760.

The spelling of 2779944778 in words is "two billion, seven hundred seventy-nine million, nine hundred forty-four thousand, seven hundred seventy-eight".