8728722865 has 16 divisors (see below), whose sum is σ = 10766181888. Its totient is φ = 6789960576.

The previous prime is 8728722851. The next prime is 8728722869. The reversal of 8728722865 is 5682278278.

It is a cyclic number.

It is not a de Polignac number, because 8728722865 - 2⁵ = 8728722833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728722869) 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, 43084 + ... + 138973.

It is an arithmetic number, because the mean of its divisors is an integer number (672886368).

Almost surely, 2^8728722865 is an apocalyptic number.

It is an amenable number.

8728722865 is a deficient number, since it is larger than the sum of its proper divisors (2037459023).

8728722865 is a wasteful number, since it uses less digits than its factorization.

8728722865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182328.

The product of its digits is 6021120, while the sum is 55.

The square root of 8728722865 is about 93427.6343754887. The cubic root of 8728722865 is about 2058.9710248192.

The spelling of 8728722865 in words is "eight billion, seven hundred twenty-eight million, seven hundred twenty-two thousand, eight hundred sixty-five".