64306563 has 16 divisors (see below), whose sum is σ = 90948096. Its totient is φ = 40277120.

The previous prime is 64306559. The next prime is 64306607. The reversal of 64306563 is 36560346.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64306563 - 2² = 64306559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64306063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51970 + ... + 53192.

It is an arithmetic number, because the mean of its divisors is an integer number (5684256).

Almost surely, 2^64306563 is an apocalyptic number.

64306563 is a deficient number, since it is larger than the sum of its proper divisors (26641533).

64306563 is a wasteful number, since it uses less digits than its factorization.

64306563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274.

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 64306563 is about 8019.1372977397. The cubic root of 64306563 is about 400.6376558640.

The spelling of 64306563 in words is "sixty-four million, three hundred six thousand, five hundred sixty-three".