64331563 has 8 divisors (see below), whose sum is σ = 65177840. Its totient is φ = 63491040.

The previous prime is 64331521. The next prime is 64331581. The reversal of 64331563 is 36513346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64331563 - 2⁹ = 64331051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64331513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23881 + ... + 26437.

It is an arithmetic number, because the mean of its divisors is an integer number (8147230).

Almost surely, 2^64331563 is an apocalyptic number.

64331563 is a deficient number, since it is larger than the sum of its proper divisors (846277).

64331563 is a wasteful number, since it uses less digits than its factorization.

64331563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877.

The product of its digits is 19440, while the sum is 31.

The square root of 64331563 is about 8020.6959174376. The cubic root of 64331563 is about 400.6895668109.

The spelling of 64331563 in words is "sixty-four million, three hundred thirty-one thousand, five hundred sixty-three".