8649684761 has 4 divisors (see below), whose sum is σ = 8860652724. Its totient is φ = 8438716800.

The previous prime is 8649684733. The next prime is 8649684787. The reversal of 8649684761 is 1674869468.

8649684761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3093473161 + 5556211600 = 55619^2 + 74540^2 .

It is a cyclic number.

It is not a de Polignac number, because 8649684761 - 2¹⁰ = 8649683737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8649684761.

It is not an unprimeable number, because it can be changed into a prime (8649684661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105483920 + ... + 105484001.

It is an arithmetic number, because the mean of its divisors is an integer number (2215163181).

Almost surely, 2^8649684761 is an apocalyptic number.

It is an amenable number.

8649684761 is a deficient number, since it is larger than the sum of its proper divisors (210967963).

8649684761 is a wasteful number, since it uses less digits than its factorization.

8649684761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210967962.

The product of its digits is 13934592, while the sum is 59.

The square root of 8649684761 is about 93003.6814378872. The cubic root of 8649684761 is about 2052.7375491814.

The spelling of 8649684761 in words is "eight billion, six hundred forty-nine million, six hundred eighty-four thousand, seven hundred sixty-one".