216935979000 has 512 divisors, whose sum is σ = 767055744000. Its totient is φ = 50668800000.

The previous prime is 216935978993. The next prime is 216935979023. The reversal of 216935979000 is 979539612.

It is a happy number.

It is a super-2 number, since 2×216935979000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 66727375 + ... + 66730625.

It is an arithmetic number, because the mean of its divisors is an integer number (1498155750).

Almost surely, 2^216935979000 is an apocalyptic number.

216935979000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216935979000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383527872000).

216935979000 is an abundant number, since it is smaller than the sum of its proper divisors (550119765000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216935979000 is a wasteful number, since it uses less digits than its factorization.

216935979000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376 (or 3362 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 51.

The spelling of 216935979000 in words is "two hundred sixteen billion, nine hundred thirty-five million, nine hundred seventy-nine thousand".