63646457063 has 12 divisors (see below), whose sum is σ = 78392876112. Its totient is φ = 51345040320.

The previous prime is 63646457057. The next prime is 63646457081. The reversal of 63646457063 is 36075464636.

It is not a de Polignac number, because 63646457063 - 2⁴ = 63646457047 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63646457033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38202323 + ... + 38203988.

It is an arithmetic number, because the mean of its divisors is an integer number (6532739676).

Almost surely, 2^63646457063 is an apocalyptic number.

63646457063 is a deficient number, since it is larger than the sum of its proper divisors (14746419049).

63646457063 is a wasteful number, since it uses less digits than its factorization.

63646457063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76406342 (or 76406335 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 50.

The spelling of 63646457063 in words is "sixty-three billion, six hundred forty-six million, four hundred fifty-seven thousand, sixty-three".