216237878968 has 16 divisors (see below), whose sum is σ = 409165713000. Its totient is φ = 107127022176.

The previous prime is 216237878933. The next prime is 216237878971. The reversal of 216237878968 is 869878732612.

It is a super-3 number, since 3×216237878968³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123988738 + ... + 123990481.

Almost surely, 2^216237878968 is an apocalyptic number.

It is an amenable number.

216237878968 is a deficient number, since it is larger than the sum of its proper divisors (192927834032).

216237878968 is a wasteful number, since it uses less digits than its factorization.

216237878968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247979334 (or 247979330 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 67.

The spelling of 216237878968 in words is "two hundred sixteen billion, two hundred thirty-seven million, eight hundred seventy-eight thousand, nine hundred sixty-eight".