64315643 has 8 divisors (see below), whose sum is σ = 73594080. Its totient is φ = 55059840.

The previous prime is 64315637. The next prime is 64315651. The reversal of 64315643 is 34651346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64315643 - 2¹⁴ = 64299259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64315633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953 + ... + 11381.

It is an arithmetic number, because the mean of its divisors is an integer number (9199260).

Almost surely, 2^64315643 is an apocalyptic number.

64315643 is a deficient number, since it is larger than the sum of its proper divisors (9278437).

64315643 is a wasteful number, since it uses less digits than its factorization.

64315643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11317.

The product of its digits is 25920, while the sum is 32.

The square root of 64315643 is about 8019.7034234440. The cubic root of 64315643 is about 400.6565114755.

Adding to 64315643 its reverse (34651346), we get a palindrome (98966989).

The spelling of 64315643 in words is "sixty-four million, three hundred fifteen thousand, six hundred forty-three".