16144861 has 2 divisors, whose sum is σ = 16144862. Its totient is φ = 16144860.

The previous prime is 16144837. The next prime is 16144871. The reversal of 16144861 is 16844161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 6095961 = 3170^2 + 2469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16144861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16144811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8072430 + 8072431.

It is an arithmetic number, because the mean of its divisors is an integer number (8072431).

Almost surely, 2^16144861 is an apocalyptic number.

It is an amenable number.

16144861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16144861 is an equidigital number, since it uses as much as digits as its factorization.

16144861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 16144861 is about 4018.0668237350. The cubic root of 16144861 is about 252.7423989916.

The spelling of 16144861 in words is "sixteen million, one hundred forty-four thousand, eight hundred sixty-one".