12039591784 has 64 divisors (see below), whose sum is σ = 25122182400. Its totient is φ = 5363404800.

The previous prime is 12039591761. The next prime is 12039591803. The reversal of 12039591784 is 48719593021.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946104 + ... + 958744.

It is an arithmetic number, because the mean of its divisors is an integer number (392534100).

Almost surely, 2^12039591784 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 12039591784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12561091200).

12039591784 is an abundant number, since it is smaller than the sum of its proper divisors (13082590616).

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

12039591784 is a wasteful number, since it uses less digits than its factorization.

12039591784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12874 (or 12870 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 12039591784 in words is "twelve billion, thirty-nine million, five hundred ninety-one thousand, seven hundred eighty-four".