643126016 has 36 divisors (see below), whose sum is σ = 1382496192. Its totient is φ = 296825856.

The previous prime is 643125991. The next prime is 643126021. The reversal of 643126016 is 610621346.

It is a happy number.

It is a super-2 number, since 2×643126016² = 827222144912064512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 643126016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93296 + ... + 99951.

It is an arithmetic number, because the mean of its divisors is an integer number (38402672).

Almost surely, 2^643126016 is an apocalyptic number.

It is an amenable number.

643126016 is an abundant number, since it is smaller than the sum of its proper divisors (739370176).

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

643126016 is a wasteful number, since it uses less digits than its factorization.

643126016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193276 (or 193262 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 643126016 is about 25359.9293374410. The cubic root of 643126016 is about 863.1746805590.

The spelling of 643126016 in words is "six hundred forty-three million, one hundred twenty-six thousand, sixteen".