8223136637220 has 144 divisors (see below), whose sum is σ = 25279962140160. Its totient is φ = 2163304136448.

The previous prime is 8223136637197. The next prime is 8223136637231. The reversal of 8223136637220 is 227366313228.

8223136637220 is a `hidden beast` number, since 8 + 2 + 2 + 3 + 1 + 3 + 6 + 637 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17154642 + ... + 17627478.

It is an arithmetic number, because the mean of its divisors is an integer number (175555292640).

Almost surely, 2^{8223136637220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8223136637220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12639981070080).

8223136637220 is an abundant number, since it is smaller than the sum of its proper divisors (17056825502940).

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

8223136637220 is a wasteful number, since it uses less digits than its factorization.

8223136637220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474154 (or 474149 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 8223136637220 in words is "eight trillion, two hundred twenty-three billion, one hundred thirty-six million, six hundred thirty-seven thousand, two hundred twenty".