163442221054664 has 8 divisors (see below), whose sum is σ = 306454164477510. Its totient is φ = 81721110527328.

The previous prime is 163442221054591. The next prime is 163442221054667. The reversal of 163442221054664 is 466450122244361.

163442221054664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 103957559537764 + 59484661516900 = 10195958^2 + 7712630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (163442221054667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215138815909 + ... + 10215138815924.

Almost surely, 2^{163442221054664} is an apocalyptic number.

It is an amenable number.

163442221054664 is a deficient number, since it is larger than the sum of its proper divisors (143011943422846).

163442221054664 is a wasteful number, since it uses less digits than its factorization.

163442221054664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430277631839 (or 20430277631835 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 50.

The spelling of 163442221054664 in words is "one hundred sixty-three trillion, four hundred forty-two billion, two hundred twenty-one million, fifty-four thousand, six hundred sixty-four".