8765326561 has 4 divisors (see below), whose sum is σ = 8781351472. Its totient is φ = 8749301652.

The previous prime is 8765326543. The next prime is 8765326571. The reversal of 8765326561 is 1656235678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8765326561 - 2¹⁷ = 8765195489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8765326501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8011635 + ... + 8012728.

It is an arithmetic number, because the mean of its divisors is an integer number (2195337868).

Almost surely, 2^8765326561 is an apocalyptic number.

It is an amenable number.

8765326561 is a deficient number, since it is larger than the sum of its proper divisors (16024911).

8765326561 is a wasteful number, since it uses less digits than its factorization.

8765326561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16024910.

The product of its digits is 1814400, while the sum is 49.

The square root of 8765326561 is about 93623.3227406505. The cubic root of 8765326561 is about 2061.8450934515.

The spelling of 8765326561 in words is "eight billion, seven hundred sixty-five million, three hundred twenty-six thousand, five hundred sixty-one".