643054331066560 has 56 divisors (see below), whose sum is σ = 1750026429551520. Its totient is φ = 220475770650624.

The previous prime is 643054331066549. The next prime is 643054331066599. The reversal of 643054331066560 is 65660133450346.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 643054331066498 and 643054331066507.

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, 143538910945 + ... + 143538915424.

Almost surely, 2^{643054331066560} is an apocalyptic number.

It is an amenable number.

643054331066560 is an abundant number, since it is smaller than the sum of its proper divisors (1106972098484960).

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

643054331066560 is a wasteful number, since it uses less digits than its factorization.

643054331066560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287077826393 (or 287077826383 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 52.

The spelling of 643054331066560 in words is "six hundred forty-three trillion, fifty-four billion, three hundred thirty-one million, sixty-six thousand, five hundred sixty".