643305600403056 has 60 divisors (see below), whose sum is σ = 1802251353874608. Its totient is φ = 214210189385472.

The previous prime is 643305600403049. The next prime is 643305600403079. The reversal of 643305600403056 is 650304006503346.

643305600403056 is a `hidden beast` number, since 6 + 4 + 3 + 3 + 0 + 5 + 600 + 4 + 0 + 30 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2343724260 + ... + 2343998723.

Almost surely, 2^{643305600403056} is an apocalyptic number.

It is an amenable number.

643305600403056 is an abundant number, since it is smaller than the sum of its proper divisors (1158945753471552).

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

643305600403056 is a wasteful number, since it uses less digits than its factorization.

643305600403056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687723950 (or 4687723941 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 45.

The spelling of 643305600403056 in words is "six hundred forty-three trillion, three hundred five billion, six hundred million, four hundred three thousand, fifty-six".