9878166921422 has 32 divisors (see below), whose sum is σ = 15027443339040. Its totient is φ = 4869517760640.

The previous prime is 9878166921421. The next prime is 9878166921437. The reversal of 9878166921422 is 2241296618789.

9878166921422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878166921421) 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, 511573904 + ... + 511593212.

It is an arithmetic number, because the mean of its divisors is an integer number (469607604345).

Almost surely, 2^{9878166921422} is an apocalyptic number.

9878166921422 is a deficient number, since it is larger than the sum of its proper divisors (5149276417618).

9878166921422 is a wasteful number, since it uses less digits than its factorization.

9878166921422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32036.

The product of its digits is 41803776, while the sum is 65.

The spelling of 9878166921422 in words is "nine trillion, eight hundred seventy-eight billion, one hundred sixty-six million, nine hundred twenty-one thousand, four hundred twenty-two".