2788106680818 has 12 divisors (see below), whose sum is σ = 6040897808478. Its totient is φ = 929368893600.

The previous prime is 2788106680813. The next prime is 2788106680847. The reversal of 2788106680818 is 8180866018872.

It can be written as a sum of positive squares in only one way, i.e., 2735970721929 + 52135958889 = 1654077^2 + 228333^2 .

It is not an unprimeable number, because it can be changed into a prime (2788106680813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77447407783 + ... + 77447407818.

Almost surely, 2^{2788106680818} is an apocalyptic number.

2788106680818 is an abundant number, since it is smaller than the sum of its proper divisors (3252791127660).

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

2788106680818 is a wasteful number, since it uses less digits than its factorization.

2788106680818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154894815609 (or 154894815606 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 63.

The spelling of 2788106680818 in words is "two trillion, seven hundred eighty-eight billion, one hundred six million, six hundred eighty thousand, eight hundred eighteen".