15444223443120 has 160 divisors (see below), whose sum is σ = 48565761592320. Its totient is φ = 4059396956160.

The previous prime is 15444223443071. The next prime is 15444223443127. The reversal of 15444223443120 is 2134432244451.

It is a super-2 number, since 2×15444223443120² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15444223443127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10435680 + ... + 11823360.

It is an arithmetic number, because the mean of its divisors is an integer number (303536009952).

Almost surely, 2^{15444223443120} is an apocalyptic number.

15444223443120 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 15444223443120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24282880796160).

15444223443120 is an abundant number, since it is smaller than the sum of its proper divisors (33121538149200).

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

15444223443120 is a wasteful number, since it uses less digits than its factorization.

15444223443120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388363 (or 1388357 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 15444223443120 its reverse (2134432244451), we get a palindrome (17578655687571).

The spelling of 15444223443120 in words is "fifteen trillion, four hundred forty-four billion, two hundred twenty-three million, four hundred forty-three thousand, one hundred twenty".