221641105614165 has 24 divisors (see below), whose sum is σ = 384282001735008. Its totient is φ = 118176563403360.

The previous prime is 221641105614157. The next prime is 221641105614169. The reversal of 221641105614165 is 561416501146122.

It is a happy number.

221641105614165 is a `hidden beast` number, since 2 + 2 + 1 + 6 + 4 + 1 + 10 + 5 + 614 + 16 + 5 = 666.

It is not a de Polignac number, because 221641105614165 - 2³ = 221641105614157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 221641105614165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221641105614169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667045759 + ... + 667377948.

It is an arithmetic number, because the mean of its divisors is an integer number (16011750072292).

Almost surely, 2^{221641105614165} is an apocalyptic number.

It is an amenable number.

221641105614165 is a deficient number, since it is larger than the sum of its proper divisors (162640896120843).

221641105614165 is a wasteful number, since it uses less digits than its factorization.

221641105614165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334427409 (or 1334427406 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 221641105614165 in words is "two hundred twenty-one trillion, six hundred forty-one billion, one hundred five million, six hundred fourteen thousand, one hundred sixty-five".