11117999278 has 12 divisors (see below), whose sum is σ = 17232323400. Its totient is φ = 5379676140.

The previous prime is 11117999273. The next prime is 11117999341. The reversal of 11117999278 is 87299971111.

11117999278 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11117999273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2890378 + ... + 2894221.

It is an arithmetic number, because the mean of its divisors is an integer number (1436026950).

Almost surely, 2^11117999278 is an apocalyptic number.

11117999278 is a deficient number, since it is larger than the sum of its proper divisors (6114324122).

11117999278 is an equidigital number, since it uses as much as digits as its factorization.

11117999278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5784663 (or 5784632 counting only the distinct ones).

The product of its digits is 571536, while the sum is 55.

The spelling of 11117999278 in words is "eleven billion, one hundred seventeen million, nine hundred ninety-nine thousand, two hundred seventy-eight".