12143534550 has 96 divisors (see below), whose sum is σ = 34513124352. Its totient is φ = 2768014080.

The previous prime is 12143534483. The next prime is 12143534573. The reversal of 12143534550 is 5543534121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369594 + ... + 401106.

It is an arithmetic number, because the mean of its divisors is an integer number (359511712).

Almost surely, 2^12143534550 is an apocalyptic number.

12143534550 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 12143534550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17256562176).

12143534550 is an abundant number, since it is smaller than the sum of its proper divisors (22369589802).

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

12143534550 is a wasteful number, since it uses less digits than its factorization.

12143534550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31902 (or 31897 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 12143534550 in words is "twelve billion, one hundred forty-three million, five hundred thirty-four thousand, five hundred fifty".