16111649 has 2 divisors, whose sum is σ = 16111650. Its totient is φ = 16111648.

The previous prime is 16111619. The next prime is 16111673. The reversal of 16111649 is 94611161.

16111649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13653025 + 2458624 = 3695^2 + 1568^2 .

It is a cyclic number.

It is not a de Polignac number, because 16111649 - 2²⁰ = 15063073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16111609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8055824 + 8055825.

It is an arithmetic number, because the mean of its divisors is an integer number (8055825).

Almost surely, 2^16111649 is an apocalyptic number.

It is an amenable number.

16111649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16111649 is an equidigital number, since it uses as much as digits as its factorization.

16111649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 16111649 is about 4013.9318628995. The cubic root of 16111649 is about 252.5689724333.

The spelling of 16111649 in words is "sixteen million, one hundred eleven thousand, six hundred forty-nine".