12640275032 has 32 divisors (see below), whose sum is σ = 29548696320. Its totient is φ = 4924782240.

The previous prime is 12640275023. The next prime is 12640275049. The reversal of 12640275032 is 23057204621.

12640275032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12640275032.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10259348 + ... + 10260579.

It is an arithmetic number, because the mean of its divisors is an integer number (923396760).

Almost surely, 2^12640275032 is an apocalyptic number.

It is an amenable number.

12640275032 is an abundant number, since it is smaller than the sum of its proper divisors (16908421288).

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

12640275032 is a wasteful number, since it uses less digits than its factorization.

12640275032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20519951 (or 20519947 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 12640275032 its reverse (23057204621), we get a palindrome (35697479653).

The spelling of 12640275032 in words is "twelve billion, six hundred forty million, two hundred seventy-five thousand, thirty-two".