16544144741 has 2 divisors, whose sum is σ = 16544144742. Its totient is φ = 16544144740.

The previous prime is 16544144731. The next prime is 16544144753. The reversal of 16544144741 is 14744144561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16408329025 + 135815716 = 128095^2 + 11654^2 .

It is an emirp because it is prime and its reverse (14744144561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16544144741 - 2²⁶ = 16477035877 is a prime.

It is a super-2 number, since 2×16544144741² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16544144731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272072370 + 8272072371.

It is an arithmetic number, because the mean of its divisors is an integer number (8272072371).

Almost surely, 2^16544144741 is an apocalyptic number.

It is an amenable number.

16544144741 is a deficient number, since it is larger than the sum of its proper divisors (1).

16544144741 is an equidigital number, since it uses as much as digits as its factorization.

16544144741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 41.

The spelling of 16544144741 in words is "sixteen billion, five hundred forty-four million, one hundred forty-four thousand, seven hundred forty-one".