12099581520 has 320 divisors, whose sum is σ = 42709766400. Its totient is φ = 2809036800.

The previous prime is 12099581489. The next prime is 12099581563. The reversal of 12099581520 is 2518599021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23771026 + ... + 23771534.

It is an arithmetic number, because the mean of its divisors is an integer number (133468020).

Almost surely, 2^12099581520 is an apocalyptic number.

12099581520 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 12099581520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21354883200).

12099581520 is an abundant number, since it is smaller than the sum of its proper divisors (30610184880).

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

12099581520 is a wasteful number, since it uses less digits than its factorization.

12099581520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The spelling of 12099581520 in words is "twelve billion, ninety-nine million, five hundred eighty-one thousand, five hundred twenty".