12104404540 has 72 divisors (see below), whose sum is σ = 26923911840. Its totient is φ = 4565683584.

The previous prime is 12104404531. The next prime is 12104404561. The reversal of 12104404540 is 4540440121.

It is a super-2 number, since 2×12104404540² (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 23 ways as a sum of consecutive naturals, for example, 1066777 + ... + 1078063.

It is an arithmetic number, because the mean of its divisors is an integer number (373943220).

Almost surely, 2^12104404540 is an apocalyptic number.

12104404540 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 12104404540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13461955920).

12104404540 is an abundant number, since it is smaller than the sum of its proper divisors (14819507300).

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

12104404540 is a wasteful number, since it uses less digits than its factorization.

12104404540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411 (or 11366 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 12104404540 its reverse (4540440121), we get a palindrome (16644844661).

The spelling of 12104404540 in words is "twelve billion, one hundred four million, four hundred four thousand, five hundred forty".