8216710783281 has 384 divisors, whose sum is σ = 17164102072320. Its totient is φ = 3815966246400.

The previous prime is 8216710783271. The next prime is 8216710783363. The reversal of 8216710783281 is 1823870176128.

8216710783281 is a `hidden beast` number, since 8 + 216 + 71 + 0 + 7 + 83 + 281 = 666.

It is not a de Polignac number, because 8216710783281 - 2⁵ = 8216710783249 is a prime.

It is a super-2 number, since 2×8216710783281² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8216710783231) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1588995826 + ... + 1589000996.

It is an arithmetic number, because the mean of its divisors is an integer number (44698182480).

Almost surely, 2^{8216710783281} is an apocalyptic number.

It is an amenable number.

8216710783281 is an abundant number, since it is smaller than the sum of its proper divisors (8947391289039).

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

8216710783281 is a wasteful number, since it uses less digits than its factorization.

8216710783281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482 (or 5469 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 8216710783281 in words is "eight trillion, two hundred sixteen billion, seven hundred ten million, seven hundred eighty-three thousand, two hundred eighty-one".