12365511444 has 144 divisors (see below), whose sum is σ = 37714884480. Its totient is φ = 3365349120.

The previous prime is 12365511439. The next prime is 12365511449. The reversal of 12365511444 is 44411556321.

It is an interprime number because it is at equal distance from previous prime (12365511439) and next prime (12365511449).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12365511399 and 12365511408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12365511449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158017 + ... + 222935.

It is an arithmetic number, because the mean of its divisors is an integer number (261908920).

Almost surely, 2^12365511444 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 12365511444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18857442240).

12365511444 is an abundant number, since it is smaller than the sum of its proper divisors (25349373036).

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

12365511444 is a wasteful number, since it uses less digits than its factorization.

12365511444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64990 (or 64985 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 12365511444 in words is "twelve billion, three hundred sixty-five million, five hundred eleven thousand, four hundred forty-four".