221643361166387 has 8 divisors (see below), whose sum is σ = 228794301560832. Its totient is φ = 214492492931400.

The previous prime is 221643361166351. The next prime is 221643361166399. The reversal of 221643361166387 is 783661163346122.

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

It is a cyclic number.

It is not a de Polignac number, because 221643361166387 - 2¹⁸ = 221643360904243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221643361166317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11762939 + ... + 24117492.

It is an arithmetic number, because the mean of its divisors is an integer number (28599287695104).

Almost surely, 2^{221643361166387} is an apocalyptic number.

221643361166387 is a deficient number, since it is larger than the sum of its proper divisors (7150940394445).

221643361166387 is a wasteful number, since it uses less digits than its factorization.

221643361166387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36079729.

The product of its digits is 31352832, while the sum is 59.

The spelling of 221643361166387 in words is "two hundred twenty-one trillion, six hundred forty-three billion, three hundred sixty-one million, one hundred sixty-six thousand, three hundred eighty-seven".