643463344524 has 384 divisors, whose sum is σ = 2154123417600. Its totient is φ = 143864709120.

The previous prime is 643463344477. The next prime is 643463344547. The reversal of 643463344524 is 425443364346.

It is a happy number.

643463344524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22243782 + ... + 22272690.

It is an arithmetic number, because the mean of its divisors is an integer number (5609696400).

Almost surely, 2^643463344524 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 643463344524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1077061708800).

643463344524 is an abundant number, since it is smaller than the sum of its proper divisors (1510660073076).

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

643463344524 is a wasteful number, since it uses less digits than its factorization.

643463344524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29073 (or 29071 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 48.

The spelling of 643463344524 in words is "six hundred forty-three billion, four hundred sixty-three million, three hundred forty-four thousand, five hundred twenty-four".