221616713665743 has 16 divisors (see below), whose sum is σ = 323008104074112. Its totient is φ = 134039609564000.

The previous prime is 221616713665673. The next prime is 221616713665747. The reversal of 221616713665743 is 347566317616122.

It is a cyclic number.

It is not a de Polignac number, because 221616713665743 - 2¹⁸ = 221616713403599 is a prime.

It is a super-2 number, since 2×221616713665743² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221616713665747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6838739388 + ... + 6838771793.

It is an arithmetic number, because the mean of its divisors is an integer number (20188006504632).

Almost surely, 2^{221616713665743} is an apocalyptic number.

221616713665743 is a deficient number, since it is larger than the sum of its proper divisors (101391390408369).

221616713665743 is a wasteful number, since it uses less digits than its factorization.

221616713665743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13677511686.

The product of its digits is 45722880, while the sum is 60.

The spelling of 221616713665743 in words is "two hundred twenty-one trillion, six hundred sixteen billion, seven hundred thirteen million, six hundred sixty-five thousand, seven hundred forty-three".