216220545657673 has 16 divisors (see below), whose sum is σ = 220028528332800. Its totient is φ = 212417357458320.

The previous prime is 216220545657643. The next prime is 216220545657707. The reversal of 216220545657673 is 376756545022612.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216220545657673 is a prime.

It is a super-2 number, since 2×216220545657673² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216220545657643) 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, 1355611458 + ... + 1355770948.

It is an arithmetic number, because the mean of its divisors is an integer number (13751783020800).

Almost surely, 2^{216220545657673} is an apocalyptic number.

It is an amenable number.

216220545657673 is a deficient number, since it is larger than the sum of its proper divisors (3807982675127).

216220545657673 is a wasteful number, since it uses less digits than its factorization.

216220545657673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174372.

The product of its (nonzero) digits is 127008000, while the sum is 61.

The spelling of 216220545657673 in words is "two hundred sixteen trillion, two hundred twenty billion, five hundred forty-five million, six hundred fifty-seven thousand, six hundred seventy-three".