8408822641209 has 27 divisors (see below), whose sum is σ = 12579727235439. Its totient is φ = 5412413104560.

The previous prime is 8408822641181. The next prime is 8408822641211. The reversal of 8408822641209 is 9021462288048.

The square root of 8408822641209 is 2899797.

It is a perfect power (a square), and thus also a powerful number.

8408822641209 is a `hidden beast` number, since 8 + 408 + 8 + 2 + 26 + 4 + 1 + 209 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4409382621609 + 3999440019600 = 2099853^2 + 1999860^2 .

It is not a de Polignac number, because 8408822641209 - 2³⁷ = 8271383687737 is a prime.

It is a super-2 number, since 2×8408822641209² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8408822641229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 252265674 + ... + 252299004.

Almost surely, 2^{8408822641209} is an apocalyptic number.

8408822641209 is the 2899797-th square number.

8408822641209 is the 1449899-th centered octagonal number.

It is an amenable number.

8408822641209 is a deficient number, since it is larger than the sum of its proper divisors (4170904594230).

8408822641209 is an frugal number, since it uses more digits than its factorization.

8408822641209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66726 (or 33363 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 54.

The spelling of 8408822641209 in words is "eight trillion, four hundred eight billion, eight hundred twenty-two million, six hundred forty-one thousand, two hundred nine".