642063216 has 80 divisors (see below), whose sum is σ = 1735531776. Its totient is φ = 204154368.

The previous prime is 642063209. The next prime is 642063221. The reversal of 642063216 is 612360246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621036 + ... + 622068.

Almost surely, 2^642063216 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 642063216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867765888).

642063216 is an abundant number, since it is smaller than the sum of its proper divisors (1093468560).

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

642063216 is a wasteful number, since it uses less digits than its factorization.

642063216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1624 counting only the distinct ones).

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

The square root of 642063216 is about 25338.9663561875. The cubic root of 642063216 is about 862.6989376859.

The spelling of 642063216 in words is "six hundred forty-two million, sixty-three thousand, two hundred sixteen".