643616134 has 16 divisors (see below), whose sum is σ = 1113108768. Its totient is φ = 273393792.

The previous prime is 643616119. The next prime is 643616143. The reversal of 643616134 is 431616346.

643616134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 643616134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201837 + ... + 205000.

It is an arithmetic number, because the mean of its divisors is an integer number (69569298).

Almost surely, 2^643616134 is an apocalyptic number.

643616134 is a deficient number, since it is larger than the sum of its proper divisors (469492634).

643616134 is a wasteful number, since it uses less digits than its factorization.

643616134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406959.

The product of its digits is 31104, while the sum is 34.

The square root of 643616134 is about 25369.5907337899. The cubic root of 643616134 is about 863.3938962929.

The spelling of 643616134 in words is "six hundred forty-three million, six hundred sixteen thousand, one hundred thirty-four".