8091889816509 has 12 divisors (see below), whose sum is σ = 12303458200800. Its totient is φ = 5110667252424.

The previous prime is 8091889816499. The next prime is 8091889816519. The reversal of 8091889816509 is 9056189881908.

8091889816509 is a `hidden beast` number, since 8 + 0 + 9 + 18 + 8 + 98 + 16 + 509 = 666.

It is an interprime number because it is at equal distance from previous prime (8091889816499) and next prime (8091889816519).

It is not a de Polignac number, because 8091889816509 - 2¹⁷ = 8091889685437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091889816519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23660496369 + ... + 23660496710.

It is an arithmetic number, because the mean of its divisors is an integer number (1025288183400).

Almost surely, 2^{8091889816509} is an apocalyptic number.

It is an amenable number.

8091889816509 is a deficient number, since it is larger than the sum of its proper divisors (4211568384291).

8091889816509 is a wasteful number, since it uses less digits than its factorization.

8091889816509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47320993104 (or 47320993101 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 72.

The spelling of 8091889816509 in words is "eight trillion, ninety-one billion, eight hundred eighty-nine million, eight hundred sixteen thousand, five hundred nine".