8428169169 has 72 divisors (see below), whose sum is σ = 15548457600. Its totient is φ = 4294031616.

The previous prime is 8428169161. The next prime is 8428169173. The reversal of 8428169169 is 9619618248.

It is not a de Polignac number, because 8428169169 - 2³ = 8428169161 is a prime.

It is a super-2 number, since 2×8428169169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8428169161) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 375732 + ... + 397530.

It is an arithmetic number, because the mean of its divisors is an integer number (215950800).

Almost surely, 2^8428169169 is an apocalyptic number.

It is an amenable number.

8428169169 is a deficient number, since it is larger than the sum of its proper divisors (7120288431).

8428169169 is a wasteful number, since it uses less digits than its factorization.

8428169169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21867 (or 21845 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 8428169169 is about 91805.0606938419. The cubic root of 8428169169 is about 2035.0624831352.

The spelling of 8428169169 in words is "eight billion, four hundred twenty-eight million, one hundred sixty-nine thousand, one hundred sixty-nine".