63645654636 has 48 divisors (see below), whose sum is σ = 169466918880. Its totient is φ = 20641832640.

The previous prime is 63645654613. The next prime is 63645654647.

It is a happy number.

63645654636 is a `hidden beast` number, since 6 + 3 + 6 + 4 + 565 + 46 + 36 = 666.

63645654636 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7959675 + ... + 7967666.

It is an arithmetic number, because the mean of its divisors is an integer number (3530560810).

Almost surely, 2^63645654636 is an apocalyptic number.

It is an amenable number.

63645654636 is an abundant number, since it is smaller than the sum of its proper divisors (105821264244).

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

63645654636 is a wasteful number, since it uses less digits than its factorization.

63645654636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15927391 (or 15927383 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 54.

The spelling of 63645654636 in words is "sixty-three billion, six hundred forty-five million, six hundred fifty-four thousand, six hundred thirty-six".