12943844550 has 576 divisors, whose sum is σ = 46407029760. Its totient is φ = 2607137280.

The previous prime is 12943844549. The next prime is 12943844567. The reversal of 12943844550 is 5544834921.

12943844550 is a `hidden beast` number, since 1 + 2 + 94 + 3 + 8 + 4 + 4 + 550 = 666.

It is a super-2 number, since 2×12943844550² (a number of 21 digits) contains 22 as substring.

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 = 12943844496 and 12943844505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 25429696 + ... + 25430204.

It is an arithmetic number, because the mean of its divisors is an integer number (80567760).

Almost surely, 2^12943844550 is an apocalyptic number.

12943844550 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 12943844550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23203514880).

12943844550 is an abundant number, since it is smaller than the sum of its proper divisors (33463185210).

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

12943844550 is a wasteful number, since it uses less digits than its factorization.

12943844550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 12943844550 in words is "twelve billion, nine hundred forty-three million, eight hundred forty-four thousand, five hundred fifty".