8216553358242 has 64 divisors (see below), whose sum is σ = 18484869634560. Its totient is φ = 2704992775632.

The previous prime is 8216553358217. The next prime is 8216553358249. The reversal of 8216553358242 is 2428533556128.

8216553358242 is a `hidden beast` number, since 8 + 2 + 1 + 6 + 5 + 53 + 3 + 582 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (8216553358249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13886773 + ... + 14466359.

It is an arithmetic number, because the mean of its divisors is an integer number (288826088040).

Almost surely, 2^{8216553358242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8216553358242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9242434817280).

8216553358242 is an abundant number, since it is smaller than the sum of its proper divisors (10268316276318).

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

8216553358242 is a wasteful number, since it uses less digits than its factorization.

8216553358242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582844 (or 582838 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 8216553358242 in words is "eight trillion, two hundred sixteen billion, five hundred fifty-three million, three hundred fifty-eight thousand, two hundred forty-two".