221671200005164 has 72 divisors (see below), whose sum is σ = 480073445795328. Its totient is φ = 87693287048640.

The previous prime is 221671200005159. The next prime is 221671200005179. The reversal of 221671200005164 is 461500002176122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 930603799 + ... + 930841969.

Almost surely, 2^{221671200005164} is an apocalyptic number.

It is an amenable number.

221671200005164 is an abundant number, since it is smaller than the sum of its proper divisors (258402245790164).

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

221671200005164 is a wasteful number, since it uses less digits than its factorization.

221671200005164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434895 (or 434880 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 221671200005164 in words is "two hundred twenty-one trillion, six hundred seventy-one billion, two hundred million, five thousand, one hundred sixty-four".