643853714 has 16 divisors (see below), whose sum is σ = 1104592896. Its totient is φ = 275726400.

The previous prime is 643853677. The next prime is 643853723. The reversal of 643853714 is 417358346.

643853714 is nontrivially palindromic in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2159 + ... + 35949.

It is an arithmetic number, because the mean of its divisors is an integer number (69037056).

Almost surely, 2^643853714 is an apocalyptic number.

643853714 is a deficient number, since it is larger than the sum of its proper divisors (460739182).

643853714 is a wasteful number, since it uses less digits than its factorization.

643853714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35161.

The product of its digits is 241920, while the sum is 41.

The square root of 643853714 is about 25374.2726792316. The cubic root of 643853714 is about 863.5001189706.

The spelling of 643853714 in words is "six hundred forty-three million, eight hundred fifty-three thousand, seven hundred fourteen".