12443505040 has 20 divisors (see below), whose sum is σ = 28931149404. Its totient is φ = 4977401984.

The previous prime is 12443505017. The next prime is 12443505047. The reversal of 12443505040 is 4050534421.

It can be written as a sum of positive squares in 2 ways, for example, as 9127127296 + 3316377744 = 95536^2 + 57588^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12443505047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77771827 + ... + 77771986.

Almost surely, 2^12443505040 is an apocalyptic number.

12443505040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12443505040 is an abundant number, since it is smaller than the sum of its proper divisors (16487644364).

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

12443505040 is a wasteful number, since it uses less digits than its factorization.

12443505040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155543826 (or 155543820 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 12443505040 in words is "twelve billion, four hundred forty-three million, five hundred five thousand, forty".