8434221868878 has 32 divisors (see below), whose sum is σ = 18166293079200. Its totient is φ = 2595105655296.

The previous prime is 8434221868871. The next prime is 8434221868889. The reversal of 8434221868878 is 8788681224348.

It is a super-2 number, since 2×8434221868878² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8434221868871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4552738 + ... + 6131546.

It is an arithmetic number, because the mean of its divisors is an integer number (567696658725).

Almost surely, 2^{8434221868878} is an apocalyptic number.

8434221868878 is an abundant number, since it is smaller than the sum of its proper divisors (9732071210322).

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

8434221868878 is a wasteful number, since it uses less digits than its factorization.

8434221868878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647316.

The product of its digits is 264241152, while the sum is 69.

The spelling of 8434221868878 in words is "eight trillion, four hundred thirty-four billion, two hundred twenty-one million, eight hundred sixty-eight thousand, eight hundred seventy-eight".