12440646660 has 96 divisors (see below), whose sum is σ = 37988375040. Its totient is φ = 3023534592.

The previous prime is 12440646629. The next prime is 12440646667. The reversal of 12440646660 is 6664604421.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12440646667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39327 + ... + 162566.

It is an arithmetic number, because the mean of its divisors is an integer number (395712240).

Almost surely, 2^12440646660 is an apocalyptic number.

12440646660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12440646660 is an abundant number, since it is smaller than the sum of its proper divisors (25547728380).

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

12440646660 is a wasteful number, since it uses less digits than its factorization.

12440646660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201997 (or 201995 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 12440646660 in words is "twelve billion, four hundred forty million, six hundred forty-six thousand, six hundred sixty".