16111111611 has 8 divisors (see below), whose sum is σ = 24550265344. Its totient is φ = 9206349480.

The previous prime is 16111111573. The next prime is 16111111699. The reversal of 16111111611 is 11611111161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16111111611 - 2⁷ = 16111111483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 767195791 = 16111111611 / (1 + 6 + 1 + 1 + 1 + 1 + 1 + 1 + 6 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16111131611) 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, 383597875 + ... + 383597916.

It is an arithmetic number, because the mean of its divisors is an integer number (3068783168).

Almost surely, 2^16111111611 is an apocalyptic number.

16111111611 is a deficient number, since it is larger than the sum of its proper divisors (8439153733).

16111111611 is an equidigital number, since it uses as much as digits as its factorization.

16111111611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767195801.

The product of its digits is 36, while the sum is 21.

Adding to 16111111611 its reverse (11611111161), we get a palindrome (27722222772).

The spelling of 16111111611 in words is "sixteen billion, one hundred eleven million, one hundred eleven thousand, six hundred eleven".