12640445262 has 24 divisors (see below), whose sum is σ = 27391310856. Its totient is φ = 4212915696.

The previous prime is 12640445261. The next prime is 12640445297. The reversal of 12640445262 is 26254404621.

12640445262 is a `hidden beast` number, since 1 + 2 + 640 + 4 + 4 + 5 + 2 + 6 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640445261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103548 + ... + 189744.

It is an arithmetic number, because the mean of its divisors is an integer number (1141304619).

Almost surely, 2^12640445262 is an apocalyptic number.

12640445262 is an abundant number, since it is smaller than the sum of its proper divisors (14750865594).

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

12640445262 is a wasteful number, since it uses less digits than its factorization.

12640445262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94352 (or 94349 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 12640445262 its reverse (26254404621), we get a palindrome (38894849883).

The spelling of 12640445262 in words is "twelve billion, six hundred forty million, four hundred forty-five thousand, two hundred sixty-two".