16986191511 has 4 divisors (see below), whose sum is σ = 22648255352. Its totient is φ = 11324127672.

The previous prime is 16986191503. The next prime is 16986191531. The reversal of 16986191511 is 11519168961.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16986191511 - 2³ = 16986191503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986191531) 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, 2831031916 + ... + 2831031921.

It is an arithmetic number, because the mean of its divisors is an integer number (5662063838).

Almost surely, 2^16986191511 is an apocalyptic number.

16986191511 is a deficient number, since it is larger than the sum of its proper divisors (5662063841).

16986191511 is an equidigital number, since it uses as much as digits as its factorization.

16986191511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662063840.

The product of its digits is 116640, while the sum is 48.

The spelling of 16986191511 in words is "sixteen billion, nine hundred eighty-six million, one hundred ninety-one thousand, five hundred eleven".