43613431663 has 2 divisors, whose sum is σ = 43613431664. Its totient is φ = 43613431662.

The previous prime is 43613431619. The next prime is 43613431669. The reversal of 43613431663 is 36613431634.

43613431663 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 a de Polignac number, because none of the positive numbers 2^k-43613431663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43613431669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21806715831 + 21806715832.

It is an arithmetic number, because the mean of its divisors is an integer number (21806715832).

Almost surely, 2^43613431663 is an apocalyptic number.

43613431663 is a deficient number, since it is larger than the sum of its proper divisors (1).

43613431663 is an equidigital number, since it uses as much as digits as its factorization.

43613431663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 40.

The spelling of 43613431663 in words is "forty-three billion, six hundred thirteen million, four hundred thirty-one thousand, six hundred sixty-three".