643046016 has 32 divisors (see below), whose sum is σ = 1708092000. Its totient is φ = 214348544.

The previous prime is 643046011. The next prime is 643046039. The reversal of 643046016 is 610640346.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (643046011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836916 + ... + 837683.

It is an arithmetic number, because the mean of its divisors is an integer number (53377875).

Almost surely, 2^643046016 is an apocalyptic number.

It is an amenable number.

643046016 is an abundant number, since it is smaller than the sum of its proper divisors (1065045984).

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

643046016 is a wasteful number, since it uses less digits than its factorization.

643046016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674616 (or 1674604 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 643046016 is about 25358.3519969260. The cubic root of 643046016 is about 863.1388882797.

The spelling of 643046016 in words is "six hundred forty-three million, forty-six thousand, sixteen".