16440761 has 2 divisors, whose sum is σ = 16440762. Its totient is φ = 16440760.

The previous prime is 16440731. The next prime is 16440799. The reversal of 16440761 is 16704461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 3444736 = 3605^2 + 1856^2 .

It is an emirp because it is prime and its reverse (16704461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16440761 - 2¹⁴ = 16424377 is a prime.

It is a super-3 number, since 3×16440761³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16440731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220380 + 8220381.

It is an arithmetic number, because the mean of its divisors is an integer number (8220381).

Almost surely, 2^16440761 is an apocalyptic number.

It is an amenable number.

16440761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16440761 is an equidigital number, since it uses as much as digits as its factorization.

16440761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 16440761 is about 4054.7208288611. The cubic root of 16440761 is about 254.2771325730.

The spelling of 16440761 in words is "sixteen million, four hundred forty thousand, seven hundred sixty-one".