12011865424 has 40 divisors (see below), whose sum is σ = 25927481160. Its totient is φ = 5352764928.

The previous prime is 12011865409. The next prime is 12011865433. The reversal of 12011865424 is 42456811021.

12011865424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 376360000 + 11635505424 = 19400^2 + 107868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12011865424.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 989647 + ... + 1001710.

It is an arithmetic number, because the mean of its divisors is an integer number (648187029).

Almost surely, 2^12011865424 is an apocalyptic number.

It is an amenable number.

12011865424 is an abundant number, since it is smaller than the sum of its proper divisors (13915615736).

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

12011865424 is a wasteful number, since it uses less digits than its factorization.

12011865424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991407 (or 1991401 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 12011865424 in words is "twelve billion, eleven million, eight hundred sixty-five thousand, four hundred twenty-four".