11111555104 has 48 divisors (see below), whose sum is σ = 23597239680. Its totient is φ = 5120006400.

The previous prime is 11111555089. The next prime is 11111555107. The reversal of 11111555104 is 40155511111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11111555107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235929 + ... + 279079.

It is an arithmetic number, because the mean of its divisors is an integer number (491609160).

Almost surely, 2^11111555104 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 11111555104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11798619840).

11111555104 is an abundant number, since it is smaller than the sum of its proper divisors (12485684576).

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

11111555104 is a wasteful number, since it uses less digits than its factorization.

11111555104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43793 (or 43785 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 25.

The spelling of 11111555104 in words is "eleven billion, one hundred eleven million, five hundred fifty-five thousand, one hundred four".