216354280869 has 24 divisors (see below), whose sum is σ = 313080348672. Its totient is φ = 143973910080.

The previous prime is 216354280861. The next prime is 216354280871. The reversal of 216354280869 is 968082453612.

216354280869 is a `hidden beast` number, since 2 + 1 + 6 + 354 + 280 + 8 + 6 + 9 = 666.

It is not a de Polignac number, because 216354280869 - 2³ = 216354280861 is a prime.

It is a super-2 number, since 2×216354280869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216354280861) 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, 26409564 + ... + 26417754.

It is an arithmetic number, because the mean of its divisors is an integer number (13045014528).

Almost surely, 2^216354280869 is an apocalyptic number.

It is an amenable number.

216354280869 is a deficient number, since it is larger than the sum of its proper divisors (96726067803).

216354280869 is a wasteful number, since it uses less digits than its factorization.

216354280869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13177 (or 13174 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 216354280869 in words is "two hundred sixteen billion, three hundred fifty-four million, two hundred eighty thousand, eight hundred sixty-nine".