43038337649 has 2 divisors, whose sum is σ = 43038337650. Its totient is φ = 43038337648.

The previous prime is 43038337609. The next prime is 43038337681. The reversal of 43038337649 is 94673383034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27521151025 + 15517186624 = 165895^2 + 124568^2 .

It is a cyclic number.

It is not a de Polignac number, because 43038337649 - 2¹² = 43038333553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43038337597 and 43038337606.

It is not a weakly prime, because it can be changed into another prime (43038337609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21519168824 + 21519168825.

It is an arithmetic number, because the mean of its divisors is an integer number (21519168825).

Almost surely, 2^43038337649 is an apocalyptic number.

It is an amenable number.

43038337649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43038337649 is an equidigital number, since it uses as much as digits as its factorization.

43038337649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 50.

The spelling of 43038337649 in words is "forty-three billion, thirty-eight million, three hundred thirty-seven thousand, six hundred forty-nine".