216857359567 has 2 divisors, whose sum is σ = 216857359568. Its totient is φ = 216857359566.

The previous prime is 216857359549. The next prime is 216857359601. The reversal of 216857359567 is 765953758612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216857359567 - 2¹⁵ = 216857326799 is a prime.

It is a super-2 number, since 2×216857359567² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216857359499 and 216857359508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216857351567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108428679783 + 108428679784.

It is an arithmetic number, because the mean of its divisors is an integer number (108428679784).

Almost surely, 2^216857359567 is an apocalyptic number.

216857359567 is a deficient number, since it is larger than the sum of its proper divisors (1).

216857359567 is an equidigital number, since it uses as much as digits as its factorization.

216857359567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256000, while the sum is 64.

The spelling of 216857359567 in words is "two hundred sixteen billion, eight hundred fifty-seven million, three hundred fifty-nine thousand, five hundred sixty-seven".