63645383568 has 40 divisors (see below), whose sum is σ = 177064722688. Its totient is φ = 19583194752.

The previous prime is 63645383539. The next prime is 63645383617. The reversal of 63645383568 is 86538354636.

It is a happy 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, 50997280 + ... + 50998527.

Almost surely, 2^63645383568 is an apocalyptic number.

It is an amenable number.

63645383568 is an abundant number, since it is smaller than the sum of its proper divisors (113419339120).

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

63645383568 is a wasteful number, since it uses less digits than its factorization.

63645383568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101995831 (or 101995825 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 57.

The spelling of 63645383568 in words is "sixty-three billion, six hundred forty-five million, three hundred eighty-three thousand, five hundred sixty-eight".