8722000561 has 8 divisors (see below), whose sum is σ = 8955972648. Its totient is φ = 8489040000.

The previous prime is 8722000517. The next prime is 8722000579. The reversal of 8722000561 is 1650002278.

It can be written as a sum of positive squares in 4 ways, for example, as 643586161 + 8078414400 = 25369^2 + 89880^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8722000561 - 2¹³ = 8721992369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8722090561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235390 + ... + 269911.

It is an arithmetic number, because the mean of its divisors is an integer number (1119496581).

Almost surely, 2^8722000561 is an apocalyptic number.

It is an amenable number.

8722000561 is a deficient number, since it is larger than the sum of its proper divisors (233972087).

8722000561 is a wasteful number, since it uses less digits than its factorization.

8722000561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505763.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 8722000561 is about 93391.6514523648. The cubic root of 8722000561 is about 2058.4423264804.

The spelling of 8722000561 in words is "eight billion, seven hundred twenty-two million, five hundred sixty-one", and thus it is an aban number.