8199509765 has 16 divisors (see below), whose sum is σ = 10257394176. Its totient is φ = 6285144000.

The previous prime is 8199509753. The next prime is 8199509771. The reversal of 8199509765 is 5679059918.

It is not a de Polignac number, because 8199509765 - 2⁴ = 8199509749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 246227 + ... + 277536.

It is an arithmetic number, because the mean of its divisors is an integer number (641087136).

Almost surely, 2^8199509765 is an apocalyptic number.

It is an amenable number.

8199509765 is a deficient number, since it is larger than the sum of its proper divisors (2057884411).

8199509765 is a wasteful number, since it uses less digits than its factorization.

8199509765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523900.

The product of its (nonzero) digits is 6123600, while the sum is 59.

The square root of 8199509765 is about 90551.1444709563. The cubic root of 8199509765 is about 2016.4894885056.

The spelling of 8199509765 in words is "eight billion, one hundred ninety-nine million, five hundred nine thousand, seven hundred sixty-five".