8422168381 has 16 divisors (see below), whose sum is σ = 9715539456. Its totient is φ = 7228800000.

The previous prime is 8422168379. The next prime is 8422168393. The reversal of 8422168381 is 1838612248.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8422168381 - 2¹ = 8422168379 is a prime.

It is a super-2 number, since 2×8422168381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422168981) 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, 287220 + ... + 315181.

It is an arithmetic number, because the mean of its divisors is an integer number (607221216).

Almost surely, 2^8422168381 is an apocalyptic number.

It is an amenable number.

8422168381 is a deficient number, since it is larger than the sum of its proper divisors (1293371075).

8422168381 is a wasteful number, since it uses less digits than its factorization.

8422168381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602484.

The product of its digits is 147456, while the sum is 43.

The square root of 8422168381 is about 91772.3726455844. The cubic root of 8422168381 is about 2034.5793858098.

The spelling of 8422168381 in words is "eight billion, four hundred twenty-two million, one hundred sixty-eight thousand, three hundred eighty-one".