43056664873 has 2 divisors, whose sum is σ = 43056664874. Its totient is φ = 43056664872.

The previous prime is 43056664831. The next prime is 43056664909. The reversal of 43056664873 is 37846665034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24264915984 + 18791748889 = 155772^2 + 137083^2 .

It is a cyclic number.

It is not a de Polignac number, because 43056664873 - 2⁹ = 43056664361 is a prime.

It is a super-2 number, since 2×43056664873² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43056664873.

It is not a weakly prime, because it can be changed into another prime (43056664073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21528332436 + 21528332437.

It is an arithmetic number, because the mean of its divisors is an integer number (21528332437).

Almost surely, 2^43056664873 is an apocalyptic number.

It is an amenable number.

43056664873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43056664873 is an equidigital number, since it uses as much as digits as its factorization.

43056664873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 43056664873 in words is "forty-three billion, fifty-six million, six hundred sixty-four thousand, eight hundred seventy-three".