11156818000 has 80 divisors (see below), whose sum is σ = 27486450576. Its totient is φ = 4378483200.

The previous prime is 11156817949. The next prime is 11156818019. The reversal of 11156818000 is 81865111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5238285376 + 5918532624 = 72376^2 + 76932^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53374 + ... + 158626.

Almost surely, 2^11156818000 is an apocalyptic number.

11156818000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11156818000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13743225288).

11156818000 is an abundant number, since it is smaller than the sum of its proper divisors (16329632576).

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

11156818000 is a wasteful number, since it uses less digits than its factorization.

11156818000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105329 (or 105313 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 31.

The spelling of 11156818000 in words is "eleven billion, one hundred fifty-six million, eight hundred eighteen thousand".