8549406369 has 135 divisors (see below), whose sum is σ = 15728558937. Its totient is φ = 4473729792.

The previous prime is 8549406347. The next prime is 8549406377. The reversal of 8549406369 is 9636049458.

The square root of 8549406369 is 92463.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3976941969 + 4572464400 = 63063^2 + 67620^2 .

It is not a de Polignac number, because 8549406369 - 2²¹ = 8547309217 is a prime.

It is a super-2 number, since 2×8549406369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8549486369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 231065019 + ... + 231065055.

Almost surely, 2^8549406369 is an apocalyptic number.

8549406369 is the 92463-rd square number.

8549406369 is the 46232-nd centered octagonal number.

It is an amenable number.

8549406369 is a deficient number, since it is larger than the sum of its proper divisors (7179152568).

8549406369 is an equidigital number, since it uses as much as digits as its factorization.

8549406369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The cubic root of 8549406369 is about 2044.7740273939.

The spelling of 8549406369 in words is "eight billion, five hundred forty-nine million, four hundred six thousand, three hundred sixty-nine".