161043723103 has 2 divisors, whose sum is σ = 161043723104. Its totient is φ = 161043723102.

The previous prime is 161043723097. The next prime is 161043723133. The reversal of 161043723103 is 301327340161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161043723103 - 2¹³ = 161043714911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161043723133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80521861551 + 80521861552.

It is an arithmetic number, because the mean of its divisors is an integer number (80521861552).

Almost surely, 2^161043723103 is an apocalyptic number.

161043723103 is a deficient number, since it is larger than the sum of its proper divisors (1).

161043723103 is an equidigital number, since it uses as much as digits as its factorization.

161043723103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 161043723103 in words is "one hundred sixty-one billion, forty-three million, seven hundred twenty-three thousand, one hundred three".