43128804461 has 2 divisors, whose sum is σ = 43128804462. Its totient is φ = 43128804460.

The previous prime is 43128804409. The next prime is 43128804503. The reversal of 43128804461 is 16440882134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34301262436 + 8827542025 = 185206^2 + 93955^2 .

It is a cyclic number.

It is not a de Polignac number, because 43128804461 - 2²² = 43124610157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43128803461) 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, 21564402230 + 21564402231.

It is an arithmetic number, because the mean of its divisors is an integer number (21564402231).

Almost surely, 2^43128804461 is an apocalyptic number.

It is an amenable number.

43128804461 is a deficient number, since it is larger than the sum of its proper divisors (1).

43128804461 is an equidigital number, since it uses as much as digits as its factorization.

43128804461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 43128804461 in words is "forty-three billion, one hundred twenty-eight million, eight hundred four thousand, four hundred sixty-one".