4437589649161 has 2 divisors, whose sum is σ = 4437589649162. Its totient is φ = 4437589649160.

The previous prime is 4437589649159. The next prime is 4437589649173. The reversal of 4437589649161 is 1619469857344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4099284559561 + 338305089600 = 2024669^2 + 581640^2 .

It is a cyclic number.

It is not a de Polignac number, because 4437589649161 - 2¹ = 4437589649159 is a prime.

Together with 4437589649159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4437589649861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2218794824580 + 2218794824581.

It is an arithmetic number, because the mean of its divisors is an integer number (2218794824581).

Almost surely, 2^{4437589649161} is an apocalyptic number.

It is an amenable number.

4437589649161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4437589649161 is an equidigital number, since it uses as much as digits as its factorization.

4437589649161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 67.

The spelling of 4437589649161 in words is "four trillion, four hundred thirty-seven billion, five hundred eighty-nine million, six hundred forty-nine thousand, one hundred sixty-one".