8204668488649 has 16 divisors (see below), whose sum is σ = 8406400178176. Its totient is φ = 8005129171200.

The previous prime is 8204668488647. The next prime is 8204668488727. The reversal of 8204668488649 is 9468848664028.

It is a cyclic number.

It is not a de Polignac number, because 8204668488649 - 2¹ = 8204668488647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8204668488647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42675274 + ... + 42867100.

It is an arithmetic number, because the mean of its divisors is an integer number (525400011136).

Almost surely, 2^{8204668488649} is an apocalyptic number.

It is an amenable number.

8204668488649 is a deficient number, since it is larger than the sum of its proper divisors (201731689527).

8204668488649 is a wasteful number, since it uses less digits than its factorization.

8204668488649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197536.

The product of its (nonzero) digits is 1019215872, while the sum is 73.

The spelling of 8204668488649 in words is "eight trillion, two hundred four billion, six hundred sixty-eight million, four hundred eighty-eight thousand, six hundred forty-nine".