43780810066937 has 2 divisors, whose sum is σ = 43780810066938. Its totient is φ = 43780810066936.

The previous prime is 43780810066921. The next prime is 43780810067023. The reversal of 43780810066937 is 73966001808734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37851336694336 + 5929473372601 = 6152344^2 + 2435051^2 .

It is a cyclic number.

It is not a de Polignac number, because 43780810066937 - 2⁴ = 43780810066921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43780810066937.

It is not a weakly prime, because it can be changed into another prime (43780810060937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890405033468 + 21890405033469.

It is an arithmetic number, because the mean of its divisors is an integer number (21890405033469).

Almost surely, 2^{43780810066937} is an apocalyptic number.

It is an amenable number.

43780810066937 is a deficient number, since it is larger than the sum of its proper divisors (1).

43780810066937 is an equidigital number, since it uses as much as digits as its factorization.

43780810066937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 43780810066937 in words is "forty-three trillion, seven hundred eighty billion, eight hundred ten million, sixty-six thousand, nine hundred thirty-seven".