8991411709893 has 4 divisors (see below), whose sum is σ = 11988548946528. Its totient is φ = 5994274473260.

The previous prime is 8991411709859. The next prime is 8991411709913. The reversal of 8991411709893 is 3989071141998.

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 8991411709893 - 2¹⁰ = 8991411708869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991411709843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498568618313 + ... + 1498568618318.

It is an arithmetic number, because the mean of its divisors is an integer number (2997137236632).

Almost surely, 2^{8991411709893} is an apocalyptic number.

It is an amenable number.

8991411709893 is a deficient number, since it is larger than the sum of its proper divisors (2997137236635).

8991411709893 is a wasteful number, since it uses less digits than its factorization.

8991411709893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997137236634.

The product of its (nonzero) digits is 35271936, while the sum is 69.

The spelling of 8991411709893 in words is "eight trillion, nine hundred ninety-one billion, four hundred eleven million, seven hundred nine thousand, eight hundred ninety-three".