216771647260 has 96 divisors (see below), whose sum is σ = 529591265280. Its totient is φ = 72996069888.

The previous prime is 216771647249. The next prime is 216771647263. The reversal of 216771647260 is 62746177612.

216771647260 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216771647263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2398207 + ... + 2486953.

It is an arithmetic number, because the mean of its divisors is an integer number (5516575680).

Almost surely, 2^216771647260 is an apocalyptic number.

216771647260 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 216771647260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264795632640).

216771647260 is an abundant number, since it is smaller than the sum of its proper divisors (312819618020).

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

216771647260 is a wasteful number, since it uses less digits than its factorization.

216771647260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89075 (or 89073 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 216771647260 in words is "two hundred sixteen billion, seven hundred seventy-one million, six hundred forty-seven thousand, two hundred sixty".