11440917138 has 64 divisors (see below), whose sum is σ = 26547886080. Its totient is φ = 3219283200.

The previous prime is 11440917101. The next prime is 11440917139. The reversal of 11440917138 is 83171904411.

It is a happy number.

11440917138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11440917138² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11440917096 and 11440917105.

It is not an unprimeable number, because it can be changed into a prime (11440917139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4057093 + ... + 4059911.

It is an arithmetic number, because the mean of its divisors is an integer number (414810720).

Almost surely, 2^11440917138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11440917138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13273943040).

11440917138 is an abundant number, since it is smaller than the sum of its proper divisors (15106968942).

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

11440917138 is a wasteful number, since it uses less digits than its factorization.

11440917138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 11440917138 in words is "eleven billion, four hundred forty million, nine hundred seventeen thousand, one hundred thirty-eight".