643037520160 has 384 divisors, whose sum is σ = 1871095209984. Its totient is φ = 203836538880.

The previous prime is 643037520137. The next prime is 643037520161. The reversal of 643037520160 is 61025730346.

It is not an unprimeable number, because it can be changed into a prime (643037520161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 256905469 + ... + 256907971.

It is an arithmetic number, because the mean of its divisors is an integer number (4872643776).

Almost surely, 2^643037520160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643037520160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935547604992).

643037520160 is an abundant number, since it is smaller than the sum of its proper divisors (1228057689824).

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

643037520160 is a wasteful number, since it uses less digits than its factorization.

643037520160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 643037520160 in words is "six hundred forty-three billion, thirty-seven million, five hundred twenty thousand, one hundred sixty".