2778577680 has 40 divisors (see below), whose sum is σ = 8613591552. Its totient is φ = 740953984.

The previous prime is 2778577663. The next prime is 2778577691. The reversal of 2778577680 is 867758772.

2778577680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 2778577680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5788464 + ... + 5788943.

Almost surely, 2^2778577680 is an apocalyptic number.

2778577680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778577680 is an abundant number, since it is smaller than the sum of its proper divisors (5835013872).

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

2778577680 is a wasteful number, since it uses less digits than its factorization.

2778577680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11577423 (or 11577417 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 57.

The square root of 2778577680 is about 52712.2156620266. The cubic root of 2778577680 is about 1405.8560286190.

The spelling of 2778577680 in words is "two billion, seven hundred seventy-eight million, five hundred seventy-seven thousand, six hundred eighty".