11109145500 has 144 divisors (see below), whose sum is σ = 35279899200. Its totient is φ = 2942640000.

The previous prime is 11109145493. The next prime is 11109145571. The reversal of 11109145500 is 554190111.

11109145500 is a `hidden beast` number, since 1 + 1 + 10 + 9 + 145 + 500 = 666.

It is a super-2 number, since 2×11109145500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671326 + ... + 687674.

It is an arithmetic number, because the mean of its divisors is an integer number (244999300).

Almost surely, 2^11109145500 is an apocalyptic number.

11109145500 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 11109145500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17639949600).

11109145500 is an abundant number, since it is smaller than the sum of its proper divisors (24170753700).

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

11109145500 is a wasteful number, since it uses less digits than its factorization.

11109145500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16525 (or 16510 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 11109145500 in words is "eleven billion, one hundred nine million, one hundred forty-five thousand, five hundred".