8544610649 has 4 divisors (see below), whose sum is σ = 8594001636. Its totient is φ = 8495219664.

The previous prime is 8544610643. The next prime is 8544610661. The reversal of 8544610649 is 9460164458.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5568144400 + 2976466249 = 74620^2 + 54557^2 .

It is a cyclic number.

It is not a de Polignac number, because 8544610649 - 2³² = 4249643353 is a prime.

It is a super-2 number, since 2×8544610649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8544610643) 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 3 ways as a sum of consecutive naturals, for example, 24695234 + ... + 24695579.

It is an arithmetic number, because the mean of its divisors is an integer number (2148500409).

Almost surely, 2^8544610649 is an apocalyptic number.

It is an amenable number.

8544610649 is a deficient number, since it is larger than the sum of its proper divisors (49390987).

8544610649 is a wasteful number, since it uses less digits than its factorization.

8544610649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49390986.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 8544610649 is about 92437.0631781430. The cubic root of 8544610649 is about 2044.3916227602.

The spelling of 8544610649 in words is "eight billion, five hundred forty-four million, six hundred ten thousand, six hundred forty-nine".