643116022216 has 64 divisors (see below), whose sum is σ = 1329625082880. Its totient is φ = 290288087040.

The previous prime is 643116022127. The next prime is 643116022223. The reversal of 643116022216 is 612220611346.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198556 + ... + 1151371.

It is an arithmetic number, because the mean of its divisors is an integer number (20775391920).

Almost surely, 2^643116022216 is an apocalyptic number.

It is an amenable number.

643116022216 is an abundant number, since it is smaller than the sum of its proper divisors (686509060664).

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

643116022216 is a wasteful number, since it uses less digits than its factorization.

643116022216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350094 (or 1350090 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 643116022216 in words is "six hundred forty-three billion, one hundred sixteen million, twenty-two thousand, two hundred sixteen".