64851443 has 4 divisors (see below), whose sum is σ = 65950680. Its totient is φ = 63752208.

The previous prime is 64851401. The next prime is 64851461. The reversal of 64851443 is 34415846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64851443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64811443) 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, 549530 + ... + 549647.

It is an arithmetic number, because the mean of its divisors is an integer number (16487670).

Almost surely, 2^64851443 is an apocalyptic number.

64851443 is a deficient number, since it is larger than the sum of its proper divisors (1099237).

64851443 is a wasteful number, since it uses less digits than its factorization.

64851443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099236.

The product of its digits is 46080, while the sum is 35.

The square root of 64851443 is about 8053.0393641159. The cubic root of 64851443 is about 401.7660309451.

The spelling of 64851443 in words is "sixty-four million, eight hundred fifty-one thousand, four hundred forty-three".