16081811 has 4 divisors (see below), whose sum is σ = 16090992. Its totient is φ = 16072632.

The previous prime is 16081801. The next prime is 16081817. The reversal of 16081811 is 11818061.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16081811 - 2²² = 11887507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16081817) 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, 1055 + ... + 5768.

It is an arithmetic number, because the mean of its divisors is an integer number (4022748).

Almost surely, 2^16081811 is an apocalyptic number.

16081811 is a deficient number, since it is larger than the sum of its proper divisors (9181).

16081811 is an equidigital number, since it uses as much as digits as its factorization.

16081811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 16081811 is about 4010.2133359710. The cubic root of 16081811 is about 252.4129608835.

Adding to 16081811 its reverse (11818061), we get a palindrome (27899872).

The spelling of 16081811 in words is "sixteen million, eighty-one thousand, eight hundred eleven".