221642673556530 has 16 divisors (see below), whose sum is σ = 531942416535744. Its totient is φ = 59104712948400.

The previous prime is 221642673556517. The next prime is 221642673556547. The reversal of 221642673556530 is 35655376246122.

It is a Curzon number.

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, 3694044559246 + ... + 3694044559305.

It is an arithmetic number, because the mean of its divisors is an integer number (33246401033484).

Almost surely, 2^{221642673556530} is an apocalyptic number.

221642673556530 is an abundant number, since it is smaller than the sum of its proper divisors (310299742979214).

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

221642673556530 is a wasteful number, since it uses less digits than its factorization.

221642673556530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388089118561.

The product of its (nonzero) digits is 54432000, while the sum is 57.

The spelling of 221642673556530 in words is "two hundred twenty-one trillion, six hundred forty-two billion, six hundred seventy-three million, five hundred fifty-six thousand, five hundred thirty".