64042643 has 8 divisors (see below), whose sum is σ = 75715680. Its totient is φ = 53000640.

The previous prime is 64042607. The next prime is 64042651. The reversal of 64042643 is 34624046.

It is a happy number.

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

It is not a de Polignac number, because 64042643 - 2¹⁰ = 64041619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64042343) 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, 157538 + ... + 157943.

It is an arithmetic number, because the mean of its divisors is an integer number (9464460).

Almost surely, 2^64042643 is an apocalyptic number.

64042643 is a deficient number, since it is larger than the sum of its proper divisors (11673037).

64042643 is a wasteful number, since it uses less digits than its factorization.

64042643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315517.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 64042643 is about 8002.6647436963. The cubic root of 64042643 is about 400.0888198595.

Adding to 64042643 its reverse (34624046), we get a palindrome (98666689).

The spelling of 64042643 in words is "sixty-four million, forty-two thousand, six hundred forty-three".