8409064221 has 8 divisors (see below), whose sum is σ = 12457872960. Its totient is φ = 5606042796.

The previous prime is 8409064193. The next prime is 8409064231. The reversal of 8409064221 is 1224609048.

8409064221 is a `hidden beast` number, since 8 + 4 + 0 + 9 + 0 + 642 + 2 + 1 = 666.

It is not a de Polignac number, because 8409064221 - 2¹⁰ = 8409063197 is a prime.

It is a super-2 number, since 2×8409064221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409064231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155723385 + ... + 155723438.

It is an arithmetic number, because the mean of its divisors is an integer number (1557234120).

Almost surely, 2^8409064221 is an apocalyptic number.

It is an amenable number.

8409064221 is a deficient number, since it is larger than the sum of its proper divisors (4048808739).

8409064221 is a wasteful number, since it uses less digits than its factorization.

8409064221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311446832 (or 311446826 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 8409064221 is about 91700.9499460066. The cubic root of 8409064221 is about 2033.5236286621.

The spelling of 8409064221 in words is "eight billion, four hundred nine million, sixty-four thousand, two hundred twenty-one".