218606000081 has 8 divisors (see below), whose sum is σ = 255645555264. Its totient is φ = 183018976560.

The previous prime is 218606000047. The next prime is 218606000099. The reversal of 218606000081 is 180000606812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 218606000081 - 2⁶ = 218606000017 is a prime.

It is a super-2 number, since 2×218606000081² (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 (218606000281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363132590 + ... + 363133191.

It is an arithmetic number, because the mean of its divisors is an integer number (31955694408).

Almost surely, 2^218606000081 is an apocalyptic number.

It is an amenable number.

218606000081 is a deficient number, since it is larger than the sum of its proper divisors (37039555183).

218606000081 is an equidigital number, since it uses as much as digits as its factorization.

218606000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726265831.

The product of its (nonzero) digits is 4608, while the sum is 32.

Adding to 218606000081 its reverse (180000606812), we get a palindrome (398606606893).

The spelling of 218606000081 in words is "two hundred eighteen billion, six hundred six million, eighty-one", and thus it is an aban number.