11156938884 has 144 divisors (see below), whose sum is σ = 34818725760. Its totient is φ = 2933314560.

The previous prime is 11156938883. The next prime is 11156938907. The reversal of 11156938884 is 48883965111.

It is a happy number.

It is a super-2 number, since 2×11156938884² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11156938884.

It is not an unprimeable number, because it can be changed into a prime (11156938883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1079212 + ... + 1089500.

Almost surely, 2^11156938884 is an apocalyptic number.

11156938884 is a gapful number since it is divisible by the number (14) 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 11156938884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17409362880).

11156938884 is an abundant number, since it is smaller than the sum of its proper divisors (23661786876).

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

11156938884 is a wasteful number, since it uses less digits than its factorization.

11156938884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650 (or 10645 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The spelling of 11156938884 in words is "eleven billion, one hundred fifty-six million, nine hundred thirty-eight thousand, eight hundred eighty-four".