11178775818 has 360 divisors, whose sum is σ = 31785348672. Its totient is φ = 2925774432.

The previous prime is 11178775807. The next prime is 11178775871. The reversal of 11178775818 is 81857787111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (878080) is a multiple of the sum of its prime factors (196).

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 134684005 + ... + 134684087.

Almost surely, 2^11178775818 is an apocalyptic number.

11178775818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11178775818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15892674336).

11178775818 is an abundant number, since it is smaller than the sum of its proper divisors (20606572854).

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

11178775818 is a wasteful number, since it uses less digits than its factorization.

11178775818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 161 counting only the distinct ones).

The product of its digits is 878080, while the sum is 54.

The spelling of 11178775818 in words is "eleven billion, one hundred seventy-eight million, seven hundred seventy-five thousand, eight hundred eighteen".