64328563 has 4 divisors (see below), whose sum is σ = 69276928. Its totient is φ = 59380200.

The previous prime is 64328543. The next prime is 64328573. The reversal of 64328563 is 36582346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36582346 = 2 ⋅18291173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64328563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64328513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2474163 + ... + 2474188.

It is an arithmetic number, because the mean of its divisors is an integer number (17319232).

Almost surely, 2^64328563 is an apocalyptic number.

64328563 is a deficient number, since it is larger than the sum of its proper divisors (4948365).

64328563 is a wasteful number, since it uses less digits than its factorization.

64328563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948364.

The product of its digits is 103680, while the sum is 37.

The square root of 64328563 is about 8020.5088990662. The cubic root of 64328563 is about 400.6833382075.

The spelling of 64328563 in words is "sixty-four million, three hundred twenty-eight thousand, five hundred sixty-three".