43553565540623 has 2 divisors, whose sum is σ = 43553565540624. Its totient is φ = 43553565540622.

The previous prime is 43553565540481. The next prime is 43553565540643. The reversal of 43553565540623 is 32604556535534.

43553565540623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43553565540623 - 2¹² = 43553565536527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43553565540643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21776782770311 + 21776782770312.

It is an arithmetic number, because the mean of its divisors is an integer number (21776782770312).

Almost surely, 2^{43553565540623} is an apocalyptic number.

43553565540623 is a deficient number, since it is larger than the sum of its proper divisors (1).

43553565540623 is an equidigital number, since it uses as much as digits as its factorization.

43553565540623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200000, while the sum is 56.

The spelling of 43553565540623 in words is "forty-three trillion, five hundred fifty-three billion, five hundred sixty-five million, five hundred forty thousand, six hundred twenty-three".