216000885881 has 4 divisors (see below), whose sum is σ = 235637330064. Its totient is φ = 196364441700.

The previous prime is 216000885851. The next prime is 216000885887. The reversal of 216000885881 is 188588000612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216000885881 is a prime.

It is a super-2 number, since 2×216000885881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216000885887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9818222075 + ... + 9818222096.

It is an arithmetic number, because the mean of its divisors is an integer number (58909332516).

Almost surely, 2^216000885881 is an apocalyptic number.

It is an amenable number.

216000885881 is a deficient number, since it is larger than the sum of its proper divisors (19636444183).

216000885881 is a wasteful number, since it uses less digits than its factorization.

216000885881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19636444182.

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

The spelling of 216000885881 in words is "two hundred sixteen billion, eight hundred eighty-five thousand, eight hundred eighty-one".