12239189550 has 288 divisors, whose sum is σ = 38440396800. Its totient is φ = 2734318080.

The previous prime is 12239189527. The next prime is 12239189561. The reversal of 12239189550 is 5598193221.

12239189550 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 91 + 8 + 9 + 550 = 666.

12239189550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 12239189496 and 12239189505.

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 143 ways as a sum of consecutive naturals, for example, 34092271 + ... + 34092629.

It is an arithmetic number, because the mean of its divisors is an integer number (133473600).

Almost surely, 2^12239189550 is an apocalyptic number.

12239189550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12239189550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19220198400).

12239189550 is an abundant number, since it is smaller than the sum of its proper divisors (26201207250).

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

12239189550 is a wasteful number, since it uses less digits than its factorization.

12239189550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 12239189550 in words is "twelve billion, two hundred thirty-nine million, one hundred eighty-nine thousand, five hundred fifty".