6865804750091 has 16 divisors (see below), whose sum is σ = 8190815129280. Its totient is φ = 5632054519680.

The previous prime is 6865804750037. The next prime is 6865804750099. The reversal of 6865804750091 is 1900574085686.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6865804750091 - 2³⁸ = 6590926843147 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6865804750091.

It is not an unprimeable number, because it can be changed into a prime (6865804750099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217270256 + ... + 217301853.

It is an arithmetic number, because the mean of its divisors is an integer number (511925945580).

Almost surely, 2^{6865804750091} is an apocalyptic number.

6865804750091 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6865804750091 is a deficient number, since it is larger than the sum of its proper divisors (1325010379189).

6865804750091 is a wasteful number, since it uses less digits than its factorization.

6865804750091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434572214.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 6865804750091 in words is "six trillion, eight hundred sixty-five billion, eight hundred four million, seven hundred fifty thousand, ninety-one".