8128723584222 has 48 divisors (see below), whose sum is σ = 18508897595760. Its totient is φ = 2575032477696.

The previous prime is 8128723584181. The next prime is 8128723584239. The reversal of 8128723584222 is 2224853278218.

8128723584222 is a `hidden beast` number, since 8 + 1 + 287 + 2 + 358 + 4 + 2 + 2 + 2 = 666.

It is a super-2 number, since 2×8128723584222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141893347 + ... + 141950622.

It is an arithmetic number, because the mean of its divisors is an integer number (385602033245).

Almost surely, 2^{8128723584222} is an apocalyptic number.

8128723584222 is an abundant number, since it is smaller than the sum of its proper divisors (10380174011538).

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

8128723584222 is a wasteful number, since it uses less digits than its factorization.

8128723584222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283844057 (or 283844054 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 54.

The spelling of 8128723584222 in words is "eight trillion, one hundred twenty-eight billion, seven hundred twenty-three million, five hundred eighty-four thousand, two hundred twenty-two".