12940642944 has 160 divisors (see below), whose sum is σ = 38580474900. Its totient is φ = 4305788928.

The previous prime is 12940642931. The next prime is 12940642969. The reversal of 12940642944 is 44924604921.

It can be written as a sum of positive squares in 2 ways, for example, as 12924961344 + 15681600 = 113688^2 + 3960^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12940642944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10460694 + ... + 10461930.

Almost surely, 2^12940642944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12940642944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19290237450).

12940642944 is an abundant number, since it is smaller than the sum of its proper divisors (25639831956).

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

12940642944 is a wasteful number, since it uses less digits than its factorization.

12940642944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 12940642944 in words is "twelve billion, nine hundred forty million, six hundred forty-two thousand, nine hundred forty-four".