216655867733760 has 2160 divisors, whose sum is σ = 977125770216960. Its totient is φ = 43297365196800.

The previous prime is 216655867733731. The next prime is 216655867733801. The reversal of 216655867733760 is 67337768556612.

216655867733760 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 5 + 586 + 7 + 7 + 3 + 37 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 43760019285 + ... + 43760024235.

Almost surely, 2^{216655867733760} is an apocalyptic number.

216655867733760 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 216655867733760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488562885108480).

216655867733760 is an abundant number, since it is smaller than the sum of its proper divisors (760469902483200).

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

216655867733760 is an equidigital number, since it uses as much as digits as its factorization.

216655867733760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056 (or 5000 counting only the distinct ones).

The product of its (nonzero) digits is 1600300800, while the sum is 72.

The spelling of 216655867733760 in words is "two hundred sixteen trillion, six hundred fifty-five billion, eight hundred sixty-seven million, seven hundred thirty-three thousand, seven hundred sixty".