64105643 has 4 divisors (see below), whose sum is σ = 73263600. Its totient is φ = 54947688.

The previous prime is 64105637. The next prime is 64105681. The reversal of 64105643 is 34650146.

It is a happy number.

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 64105643 - 2⁴ = 64105627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64105043) 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, 4578968 + ... + 4578981.

It is an arithmetic number, because the mean of its divisors is an integer number (18315900).

Almost surely, 2^64105643 is an apocalyptic number.

64105643 is a deficient number, since it is larger than the sum of its proper divisors (9157957).

64105643 is an equidigital number, since it uses as much as digits as its factorization.

64105643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9157956.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64105643 is about 8006.5999650289. The cubic root of 64105643 is about 400.2199685957.

Adding to 64105643 its reverse (34650146), we get a palindrome (98755789).

The spelling of 64105643 in words is "sixty-four million, one hundred five thousand, six hundred forty-three".