642222054816 has 48 divisors (see below), whose sum is σ = 1704774859200. Its totient is φ = 211668689408.

The previous prime is 642222054791. The next prime is 642222054823. The reversal of 642222054816 is 618450222246.

642222054816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 37574676 + ... + 37591763.

It is an arithmetic number, because the mean of its divisors is an integer number (35516142900).

Almost surely, 2^642222054816 is an apocalyptic number.

It is an amenable number.

642222054816 is an abundant number, since it is smaller than the sum of its proper divisors (1062552804384).

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

642222054816 is a wasteful number, since it uses less digits than its factorization.

642222054816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75166541 (or 75166533 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 642222054816 in words is "six hundred forty-two billion, two hundred twenty-two million, fifty-four thousand, eight hundred sixteen".