12640503708 has 48 divisors (see below), whose sum is σ = 37453346560. Its totient is φ = 3611572272.

The previous prime is 12640503703. The next prime is 12640503709. The reversal of 12640503708 is 80730504621.

12640503708 is a `hidden beast` number, since 1 + 2 + 640 + 5 + 0 + 3 + 7 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640503703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8359366 + ... + 8360877.

Almost surely, 2^12640503708 is an apocalyptic number.

12640503708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12640503708 is an abundant number, since it is smaller than the sum of its proper divisors (24812842852).

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

12640503708 is a wasteful number, since it uses less digits than its factorization.

12640503708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16720263 (or 16720255 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 12640503708 in words is "twelve billion, six hundred forty million, five hundred three thousand, seven hundred eight".