64043563 has 4 divisors (see below), whose sum is σ = 65406240. Its totient is φ = 62680888.

The previous prime is 64043561. The next prime is 64043587. The reversal of 64043563 is 36534046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36534046 = 2 ⋅18267023.

It is a cyclic number.

It is not a de Polignac number, because 64043563 - 2¹ = 64043561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64043561) 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, 681268 + ... + 681361.

It is an arithmetic number, because the mean of its divisors is an integer number (16351560).

Almost surely, 2^64043563 is an apocalyptic number.

64043563 is a deficient number, since it is larger than the sum of its proper divisors (1362677).

64043563 is a wasteful number, since it uses less digits than its factorization.

64043563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362676.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 64043563 is about 8002.7222243434. The cubic root of 64043563 is about 400.0907356660.

The spelling of 64043563 in words is "sixty-four million, forty-three thousand, five hundred sixty-three".