865099816811 has 8 divisors (see below), whose sum is σ = 877262853600. Its totient is φ = 853021540288.

The previous prime is 865099816751. The next prime is 865099816849. The reversal of 865099816811 is 118618990568.

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 865099816811 - 2⁶ = 865099816747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865099816411) 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, 21169511 + ... + 21210336.

It is an arithmetic number, because the mean of its divisors is an integer number (109657856700).

Almost surely, 2^865099816811 is an apocalyptic number.

865099816811 is a deficient number, since it is larger than the sum of its proper divisors (12163036789).

865099816811 is a wasteful number, since it uses less digits than its factorization.

865099816811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42380133.

The product of its (nonzero) digits is 7464960, while the sum is 62.

The spelling of 865099816811 in words is "eight hundred sixty-five billion, ninety-nine million, eight hundred sixteen thousand, eight hundred eleven".