8423594889649 has 9 divisors (see below), whose sum is σ = 8501903870187. Its totient is φ = 8346000749544.

The previous prime is 8423594889581. The next prime is 8423594889667. The reversal of 8423594889649 is 9469884953248.

The square root of 8423594889649 is 2902343.

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

It can be written as a sum of positive squares in only one way, i.e., 5871205225249 + 2552389664400 = 2423057^2 + 1597620^2 .

It is not a de Polignac number, because 8423594889649 - 2⁴¹ = 6224571634097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8423594689649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 316342074 + ... + 316368700.

Almost surely, 2^{8423594889649} is an apocalyptic number.

8423594889649 is the 2902343-rd square number.

8423594889649 is the 1451172-nd centered octagonal number.

It is an amenable number.

8423594889649 is a deficient number, since it is larger than the sum of its proper divisors (78308980538).

8423594889649 is an frugal number, since it uses more digits than its factorization.

8423594889649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53472 (or 26736 counting only the distinct ones).

The product of its digits is 4299816960, while the sum is 79.

The spelling of 8423594889649 in words is "eight trillion, four hundred twenty-three billion, five hundred ninety-four million, eight hundred eighty-nine thousand, six hundred forty-nine".