2778771160 has 32 divisors (see below), whose sum is σ = 6820621200. Its totient is φ = 1010462080.

The previous prime is 2778771139. The next prime is 2778771161. The reversal of 2778771160 is 611778772.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2778771160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778771161) 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, 3157255 + ... + 3158134.

Almost surely, 2^2778771160 is an apocalyptic number.

2778771160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778771160 is an abundant number, since it is smaller than the sum of its proper divisors (4041850040).

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

2778771160 is a wasteful number, since it uses less digits than its factorization.

2778771160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315411 (or 6315407 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 46.

The square root of 2778771160 is about 52714.0508783000. The cubic root of 2778771160 is about 1405.8886590679. Note that the first 3 decimals are identical.

The spelling of 2778771160 in words is "two billion, seven hundred seventy-eight million, seven hundred seventy-one thousand, one hundred sixty".