216936903840 has 192 divisors, whose sum is σ = 706568002560. Its totient is φ = 55890616320.

The previous prime is 216936903829. The next prime is 216936903851. The reversal of 216936903840 is 48309639612.

It is an interprime number because it is at equal distance from previous prime (216936903829) and next prime (216936903851).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9169146 + ... + 9192774.

It is an arithmetic number, because the mean of its divisors is an integer number (3680041680).

Almost surely, 2^216936903840 is an apocalyptic number.

216936903840 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 216936903840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353284001280).

216936903840 is an abundant number, since it is smaller than the sum of its proper divisors (489631098720).

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

216936903840 is a wasteful number, since it uses less digits than its factorization.

216936903840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24295 (or 24287 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 216936903840 in words is "two hundred sixteen billion, nine hundred thirty-six million, nine hundred three thousand, eight hundred forty".