11398018356 has 120 divisors (see below), whose sum is σ = 31607702280. Its totient is φ = 3569246208.

The previous prime is 11398018349. The next prime is 11398018397. The reversal of 11398018356 is 65381089311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3394926756 + 8003091600 = 58266^2 + 89460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3595140 + ... + 3598308.

It is an arithmetic number, because the mean of its divisors is an integer number (263397519).

Almost surely, 2^11398018356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11398018356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15803851140).

11398018356 is an abundant number, since it is smaller than the sum of its proper divisors (20209683924).

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

11398018356 is a wasteful number, since it uses less digits than its factorization.

11398018356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855 (or 3844 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 11398018356 in words is "eleven billion, three hundred ninety-eight million, eighteen thousand, three hundred fifty-six".