12640012775 has 18 divisors (see below), whose sum is σ = 16972027560. Its totient is φ = 9334160160.

The previous prime is 12640012747. The next prime is 12640012787. The reversal of 12640012775 is 57721004621.

It is not a de Polignac number, because 12640012775 - 2⁶ = 12640012711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1491635 + ... + 1500084.

It is an arithmetic number, because the mean of its divisors is an integer number (942890420).

Almost surely, 2^12640012775 is an apocalyptic number.

12640012775 is a deficient number, since it is larger than the sum of its proper divisors (4332014785).

12640012775 is a wasteful number, since it uses less digits than its factorization.

12640012775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991755 (or 2991737 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 12640012775 in words is "twelve billion, six hundred forty million, twelve thousand, seven hundred seventy-five".