23663643646 has 16 divisors (see below), whose sum is σ = 38098279584. Its totient is φ = 10983285504.

The previous prime is 23663643611. The next prime is 23663643659. The reversal of 23663643646 is 64634636632.

It is a self number, because there is not a number n which added to its sum of digits gives 23663643646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4764570 + ... + 4769533.

It is an arithmetic number, because the mean of its divisors is an integer number (2381142474).

Almost surely, 2^23663643646 is an apocalyptic number.

23663643646 is a deficient number, since it is larger than the sum of its proper divisors (14434635938).

23663643646 is a wasteful number, since it uses less digits than its factorization.

23663643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534195.

The product of its digits is 6718464, while the sum is 49.

The spelling of 23663643646 in words is "twenty-three billion, six hundred sixty-three million, six hundred forty-three thousand, six hundred forty-six".