64663563 has 16 divisors (see below), whose sum is σ = 91514880. Its totient is φ = 40473216.

The previous prime is 64663561. The next prime is 64663579. The reversal of 64663563 is 36536646.

It is a happy number.

64663563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64663563 - 2¹ = 64663561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64663561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23106 + ... + 25752.

It is an arithmetic number, because the mean of its divisors is an integer number (5719680).

Almost surely, 2^64663563 is an apocalyptic number.

64663563 is a deficient number, since it is larger than the sum of its proper divisors (26851317).

64663563 is a wasteful number, since it uses less digits than its factorization.

64663563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146.

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

The square root of 64663563 is about 8041.3657422107. The cubic root of 64663563 is about 401.3776725153.

The spelling of 64663563 in words is "sixty-four million, six hundred sixty-three thousand, five hundred sixty-three".