43057556449 has 2 divisors, whose sum is σ = 43057556450. Its totient is φ = 43057556448.

The previous prime is 43057556411. The next prime is 43057556453. The reversal of 43057556449 is 94465575034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43056250000 + 1306449 = 207500^2 + 1143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43057556449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43057556396 and 43057556405.

It is not a weakly prime, because it can be changed into another prime (43057556459) 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, 21528778224 + 21528778225.

It is an arithmetic number, because the mean of its divisors is an integer number (21528778225).

Almost surely, 2^43057556449 is an apocalyptic number.

It is an amenable number.

43057556449 is a deficient number, since it is larger than the sum of its proper divisors (1).

43057556449 is an equidigital number, since it uses as much as digits as its factorization.

43057556449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 43057556449 in words is "forty-three billion, fifty-seven million, five hundred fifty-six thousand, four hundred forty-nine".