8216108885 has 4 divisors (see below), whose sum is σ = 9859330668. Its totient is φ = 6572887104.

The previous prime is 8216108863. The next prime is 8216108903. The reversal of 8216108885 is 5888016128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1985058916 + 6231049969 = 44554^2 + 78937^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216108885 - 2¹⁶ = 8216043349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 821610884 + ... + 821610893.

It is an arithmetic number, because the mean of its divisors is an integer number (2464832667).

Almost surely, 2^8216108885 is an apocalyptic number.

It is an amenable number.

8216108885 is a deficient number, since it is larger than the sum of its proper divisors (1643221783).

8216108885 is a wasteful number, since it uses less digits than its factorization.

8216108885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643221782.

The product of its (nonzero) digits is 245760, while the sum is 47.

The square root of 8216108885 is about 90642.7541781471. The cubic root of 8216108885 is about 2017.8493010802.

The spelling of 8216108885 in words is "eight billion, two hundred sixteen million, one hundred eight thousand, eight hundred eighty-five".