4257984643 has 8 divisors (see below), whose sum is σ = 4688487360. Its totient is φ = 3834717480.

The previous prime is 4257984631. The next prime is 4257984667. The reversal of 4257984643 is 3464897524.

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

It is a de Polignac number, because none of the positive numbers 2^k-4257984643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4257984623) 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, 1807653 + ... + 1810006.

It is an arithmetic number, because the mean of its divisors is an integer number (586060920).

Almost surely, 2^4257984643 is an apocalyptic number.

4257984643 is a deficient number, since it is larger than the sum of its proper divisors (430502717).

4257984643 is a wasteful number, since it uses less digits than its factorization.

4257984643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617777.

The product of its digits is 5806080, while the sum is 52.

The square root of 4257984643 is about 65253.2347320805. The cubic root of 4257984643 is about 1620.8196638297.

The spelling of 4257984643 in words is "four billion, two hundred fifty-seven million, nine hundred eighty-four thousand, six hundred forty-three".