4044623145649 has 2 divisors, whose sum is σ = 4044623145650. Its totient is φ = 4044623145648.

The previous prime is 4044623145637. The next prime is 4044623145677. The reversal of 4044623145649 is 9465413264404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3847749018624 + 196874127025 = 1961568^2 + 443705^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044623145649 - 2¹¹ = 4044623143601 is a prime.

It is a super-2 number, since 2×4044623145649² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4044623145596 and 4044623145605.

It is not a weakly prime, because it can be changed into another prime (4044623115649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022311572824 + 2022311572825.

It is an arithmetic number, because the mean of its divisors is an integer number (2022311572825).

Almost surely, 2^{4044623145649} is an apocalyptic number.

It is an amenable number.

4044623145649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044623145649 is an equidigital number, since it uses as much as digits as its factorization.

4044623145649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 4044623145649 in words is "four trillion, forty-four billion, six hundred twenty-three million, one hundred forty-five thousand, six hundred forty-nine".