8719392561 has 16 divisors (see below), whose sum is σ = 13120090560. Its totient is φ = 5102256320.

The previous prime is 8719392559. The next prime is 8719392569. The reversal of 8719392561 is 1652939178.

It is a cyclic number.

It is not a de Polignac number, because 8719392561 - 2¹ = 8719392559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8719392569) 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 15 ways as a sum of consecutive naturals, for example, 4554630 + ... + 4556543.

It is an arithmetic number, because the mean of its divisors is an integer number (820005660).

Almost surely, 2^8719392561 is an apocalyptic number.

It is an amenable number.

8719392561 is a deficient number, since it is larger than the sum of its proper divisors (4400697999).

8719392561 is a wasteful number, since it uses less digits than its factorization.

8719392561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111216.

The product of its digits is 816480, while the sum is 51.

The square root of 8719392561 is about 93377.6877042905. The cubic root of 8719392561 is about 2058.2371383581.

The spelling of 8719392561 in words is "eight billion, seven hundred nineteen million, three hundred ninety-two thousand, five hundred sixty-one".