12444349518 has 64 divisors (see below), whose sum is σ = 28293995520. Its totient is φ = 4052457216.

The previous prime is 12444349517. The next prime is 12444349543. The reversal of 12444349518 is 81594344421.

12444349518 is a `hidden beast` number, since 12 + 44 + 43 + 49 + 518 = 666.

12444349518 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12444349518² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444349513) 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, 1485630 + ... + 1493982.

It is an arithmetic number, because the mean of its divisors is an integer number (442093680).

Almost surely, 2^12444349518 is an apocalyptic number.

12444349518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12444349518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14146997760).

12444349518 is an abundant number, since it is smaller than the sum of its proper divisors (15849646002).

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

12444349518 is a wasteful number, since it uses less digits than its factorization.

12444349518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998 (or 8992 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 12444349518 in words is "twelve billion, four hundred forty-four million, three hundred forty-nine thousand, five hundred eighteen".