643352465152 has 72 divisors (see below), whose sum is σ = 1368738780192. Its totient is φ = 300748800000.

The previous prime is 643352465149. The next prime is 643352465167. The reversal of 643352465152 is 251564253346.

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, 167652 + ... + 1146652.

It is an arithmetic number, because the mean of its divisors is an integer number (19010260836).

Almost surely, 2^643352465152 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 643352465152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684369390096).

643352465152 is an abundant number, since it is smaller than the sum of its proper divisors (725386315040).

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

643352465152 is a wasteful number, since it uses less digits than its factorization.

643352465152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979185 (or 979171 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 46.

The spelling of 643352465152 in words is "six hundred forty-three billion, three hundred fifty-two million, four hundred sixty-five thousand, one hundred fifty-two".