64013543 has 16 divisors (see below), whose sum is σ = 72686592. Its totient is φ = 55848000.

The previous prime is 64013447. The next prime is 64013557. The reversal of 64013543 is 34531046.

It is a cyclic number.

It is not a de Polignac number, because 64013543 - 2¹⁴ = 63997159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64013843) 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, 43955 + ... + 45387.

It is an arithmetic number, because the mean of its divisors is an integer number (4542912).

Almost surely, 2^64013543 is an apocalyptic number.

64013543 is a deficient number, since it is larger than the sum of its proper divisors (8673049).

64013543 is a wasteful number, since it uses less digits than its factorization.

64013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 64013543 is about 8000.8463927262. The cubic root of 64013543 is about 400.0282125934.

Adding to 64013543 its reverse (34531046), we get a palindrome (98544589).

The spelling of 64013543 in words is "sixty-four million, thirteen thousand, five hundred forty-three".