43556456497 has 2 divisors, whose sum is σ = 43556456498. Its totient is φ = 43556456496.

The previous prime is 43556456467. The next prime is 43556456521. The reversal of 43556456497 is 79465465534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42172318881 + 1384137616 = 205359^2 + 37204^2 .

It is a cyclic number.

It is not a de Polignac number, because 43556456497 - 2⁷ = 43556456369 is a prime.

It is a super-2 number, since 2×43556456497² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43556456467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21778228248 + 21778228249.

It is an arithmetic number, because the mean of its divisors is an integer number (21778228249).

Almost surely, 2^43556456497 is an apocalyptic number.

It is an amenable number.

43556456497 is a deficient number, since it is larger than the sum of its proper divisors (1).

43556456497 is an equidigital number, since it uses as much as digits as its factorization.

43556456497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432000, while the sum is 58.

The spelling of 43556456497 in words is "forty-three billion, five hundred fifty-six million, four hundred fifty-six thousand, four hundred ninety-seven".