12644434350 has 36 divisors (see below), whose sum is σ = 33971381496. Its totient is φ = 3371849040.

The previous prime is 12644434343. The next prime is 12644434381. The reversal of 12644434350 is 5343444621.

12644434350 is a `hidden beast` number, since 1 + 2 + 644 + 4 + 3 + 4 + 3 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14048922 + ... + 14049821.

It is an arithmetic number, because the mean of its divisors is an integer number (943649486).

Almost surely, 2^12644434350 is an apocalyptic number.

12644434350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12644434350 is an abundant number, since it is smaller than the sum of its proper divisors (21326947146).

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

12644434350 is a wasteful number, since it uses less digits than its factorization.

12644434350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28098761 (or 28098753 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 12644434350 its reverse (5343444621), we get a palindrome (17987878971).

The spelling of 12644434350 in words is "twelve billion, six hundred forty-four million, four hundred thirty-four thousand, three hundred fifty".