221642673556505 has 8 divisors (see below), whose sum is σ = 279969692913600. Its totient is φ = 167981815748016.

The previous prime is 221642673556483. The next prime is 221642673556517. The reversal of 221642673556505 is 505655376246122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221642673556505 - 2⁴⁴ = 204050487512089 is a prime.

It is a super-3 number, since 3×221642673556505³ (a number of 44 digits) contains 333 as substring.

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, 1166540387045 + ... + 1166540387234.

It is an arithmetic number, because the mean of its divisors is an integer number (34996211614200).

Almost surely, 2^{221642673556505} is an apocalyptic number.

It is an amenable number.

221642673556505 is a deficient number, since it is larger than the sum of its proper divisors (58327019357095).

221642673556505 is a wasteful number, since it uses less digits than its factorization.

221642673556505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333080774303.

The product of its (nonzero) digits is 90720000, while the sum is 59.

The spelling of 221642673556505 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 five".