216618130155 has 64 divisors (see below), whose sum is σ = 413520307200. Its totient is φ = 94733452800.

The previous prime is 216618130121. The next prime is 216618130171. The reversal of 216618130155 is 551031816612.

It is a happy number.

It is not a de Polignac number, because 216618130155 - 2¹⁵ = 216618097387 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 5580 + ... + 658230.

It is an arithmetic number, because the mean of its divisors is an integer number (6461254800).

Almost surely, 2^216618130155 is an apocalyptic number.

216618130155 is a deficient number, since it is larger than the sum of its proper divisors (196902177045).

216618130155 is a wasteful number, since it uses less digits than its factorization.

216618130155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652804.

The product of its (nonzero) digits is 43200, while the sum is 39.

Adding to 216618130155 its reverse (551031816612), we get a palindrome (767649946767).

The spelling of 216618130155 in words is "two hundred sixteen billion, six hundred eighteen million, one hundred thirty thousand, one hundred fifty-five".