64541143 has 4 divisors (see below), whose sum is σ = 64557688. Its totient is φ = 64524600.

The previous prime is 64541123. The next prime is 64541149. The reversal of 64541143 is 34114546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64541143 - 2²¹ = 62443991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64541149) 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, 1180 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (16139422).

Almost surely, 2^64541143 is an apocalyptic number.

64541143 is a deficient number, since it is larger than the sum of its proper divisors (16545).

64541143 is a wasteful number, since it uses less digits than its factorization.

64541143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544.

The product of its digits is 5760, while the sum is 28.

The square root of 64541143 is about 8033.7502450599. The cubic root of 64541143 is about 401.1242186211.

Adding to 64541143 its reverse (34114546), we get a palindrome (98655689).

The spelling of 64541143 in words is "sixty-four million, five hundred forty-one thousand, one hundred forty-three".