216697129328041 has 16 divisors (see below), whose sum is σ = 229680996834960. Its totient is φ = 203739627386880.

The previous prime is 216697129328039. The next prime is 216697129328051. The reversal of 216697129328041 is 140823921796612.

It can be written as a sum of positive squares in 8 ways, for example, as 8257599948816 + 208439529379225 = 2873604^2 + 14437435^2 .

It is a cyclic number.

It is not a de Polignac number, because 216697129328041 - 2¹ = 216697129328039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216697129328051) 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, 201423805 + ... + 202496773.

It is an arithmetic number, because the mean of its divisors is an integer number (14355062302185).

Almost surely, 2^{216697129328041} is an apocalyptic number.

It is an amenable number.

216697129328041 is a deficient number, since it is larger than the sum of its proper divisors (12983867506919).

216697129328041 is a wasteful number, since it uses less digits than its factorization.

216697129328041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085244.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 216697129328041 in words is "two hundred sixteen trillion, six hundred ninety-seven billion, one hundred twenty-nine million, three hundred twenty-eight thousand, forty-one".