643345663134 has 16 divisors (see below), whose sum is σ = 1289269872000. Its totient is φ = 214018796760.

The previous prime is 643345663127. The next prime is 643345663151. The reversal of 643345663134 is 431366543346.

643345663134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 107436162 + ... + 107442149.

It is an arithmetic number, because the mean of its divisors is an integer number (80579367000).

Almost surely, 2^643345663134 is an apocalyptic number.

643345663134 is an abundant number, since it is smaller than the sum of its proper divisors (645924208866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643345663134 is a wasteful number, since it uses less digits than its factorization.

643345663134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214878815.

The product of its digits is 5598720, while the sum is 48.

The spelling of 643345663134 in words is "six hundred forty-three billion, three hundred forty-five million, six hundred sixty-three thousand, one hundred thirty-four".