16443413577761 has 2 divisors, whose sum is σ = 16443413577762. Its totient is φ = 16443413577760.

The previous prime is 16443413577749. The next prime is 16443413577781. The reversal of 16443413577761 is 16777531434461.

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., 12525511939600 + 3917901638161 = 3539140^2 + 1979369^2 .

It is a cyclic number.

It is not a de Polignac number, because 16443413577761 - 2³⁰ = 16442339835937 is a prime.

It is a super-3 number, since 3×16443413577761³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16443413577761.

It is not a weakly prime, because it can be changed into another prime (16443413577781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221706788880 + 8221706788881.

It is an arithmetic number, because the mean of its divisors is an integer number (8221706788881).

Almost surely, 2^{16443413577761} is an apocalyptic number.

It is an amenable number.

16443413577761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16443413577761 is an equidigital number, since it uses as much as digits as its factorization.

16443413577761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 59.

The spelling of 16443413577761 in words is "sixteen trillion, four hundred forty-three billion, four hundred thirteen million, five hundred seventy-seven thousand, seven hundred sixty-one".