13056640646 has 48 divisors (see below), whose sum is σ = 23382334800. Its totient is φ = 5450131008.

The previous prime is 13056640633. The next prime is 13056640687. The reversal of 13056640646 is 64604665031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 619880 + ... + 640596.

It is an arithmetic number, because the mean of its divisors is an integer number (487131975).

Almost surely, 2^13056640646 is an apocalyptic number.

13056640646 is a deficient number, since it is larger than the sum of its proper divisors (10325694154).

13056640646 is a wasteful number, since it uses less digits than its factorization.

13056640646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20901 (or 20894 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 13056640646 in words is "thirteen billion, fifty-six million, six hundred forty thousand, six hundred forty-six".