43511039161 has 2 divisors, whose sum is σ = 43511039162. Its totient is φ = 43511039160.

The previous prime is 43511039093. The next prime is 43511039261. The reversal of 43511039161 is 16193011534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39867709561 + 3643329600 = 199669^2 + 60360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43511039161 is a prime.

It is not a weakly prime, because it can be changed into another prime (43511039261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21755519580 + 21755519581.

It is an arithmetic number, because the mean of its divisors is an integer number (21755519581).

Almost surely, 2^43511039161 is an apocalyptic number.

It is an amenable number.

43511039161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43511039161 is an equidigital number, since it uses as much as digits as its factorization.

43511039161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 43511039161 in words is "forty-three billion, five hundred eleven million, thirty-nine thousand, one hundred sixty-one".