63745616668 has 24 divisors (see below), whose sum is σ = 112280515200. Its totient is φ = 31665942000.

The previous prime is 63745616659. The next prime is 63745616681. The reversal of 63745616668 is 86661654736.

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, 485043 + ... + 602293.

It is an arithmetic number, because the mean of its divisors is an integer number (4678354800).

Almost surely, 2^63745616668 is an apocalyptic number.

It is an amenable number.

63745616668 is a deficient number, since it is larger than the sum of its proper divisors (48534898532).

63745616668 is a wasteful number, since it uses less digits than its factorization.

63745616668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118137 (or 118135 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 58.

The spelling of 63745616668 in words is "sixty-three billion, seven hundred forty-five million, six hundred sixteen thousand, six hundred sixty-eight".