163103561321543 has 2 divisors, whose sum is σ = 163103561321544. Its totient is φ = 163103561321542.

The previous prime is 163103561321531. The next prime is 163103561321557. The reversal of 163103561321543 is 345123165301361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163103561321543 - 2⁴ = 163103561321527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163103561321494 and 163103561321503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163103561321593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81551780660771 + 81551780660772.

It is an arithmetic number, because the mean of its divisors is an integer number (81551780660772).

Almost surely, 2^{163103561321543} is an apocalyptic number.

163103561321543 is a deficient number, since it is larger than the sum of its proper divisors (1).

163103561321543 is an equidigital number, since it uses as much as digits as its factorization.

163103561321543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 163103561321543 in words is "one hundred sixty-three trillion, one hundred three billion, five hundred sixty-one million, three hundred twenty-one thousand, five hundred forty-three".