63656463 has 16 divisors (see below), whose sum is σ = 91644896. Its totient is φ = 39070080.

The previous prime is 63656447. The next prime is 63656473. The reversal of 63656463 is 36465636.

It is a happy number.

It is not a de Polignac number, because 63656463 - 2⁴ = 63656447 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is the 7979-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63656473) by changing a digit.

It is a nontrivial repunit in base 7978.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14481 + ... + 18357.

It is an arithmetic number, because the mean of its divisors is an integer number (5727806).

Almost surely, 2^63656463 is an apocalyptic number.

63656463 is a deficient number, since it is larger than the sum of its proper divisors (27988433).

63656463 is a wasteful number, since it uses less digits than its factorization.

63656463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314.

The product of its digits is 233280, while the sum is 39.

The square root of 63656463 is about 7978.5000470013. The cubic root of 63656463 is about 399.2830135105.

The spelling of 63656463 in words is "sixty-three million, six hundred fifty-six thousand, four hundred sixty-three".