2778813875 has 16 divisors (see below), whose sum is σ = 3472372800. Its totient is φ = 2220222400.

The previous prime is 2778813871. The next prime is 2778813893. The reversal of 2778813875 is 5783188772.

2778813875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2778813875 - 2² = 2778813871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2778813875.

It is not an unprimeable number, because it can be changed into a prime (2778813871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87386 + ... + 114864.

It is an arithmetic number, because the mean of its divisors is an integer number (217023300).

Almost surely, 2^2778813875 is an apocalyptic number.

2778813875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2778813875 is a deficient number, since it is larger than the sum of its proper divisors (693558925).

2778813875 is an equidigital number, since it uses as much as digits as its factorization.

2778813875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28303 (or 28293 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 56.

The square root of 2778813875 is about 52714.4560343745. The cubic root of 2778813875 is about 1405.8958627589.

The spelling of 2778813875 in words is "two billion, seven hundred seventy-eight million, eight hundred thirteen thousand, eight hundred seventy-five".