161745948743 has 2 divisors, whose sum is σ = 161745948744. Its totient is φ = 161745948742.

The previous prime is 161745948739. The next prime is 161745948827. The reversal of 161745948743 is 347849547161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161745948743 - 2² = 161745948739 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161745948733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80872974371 + 80872974372.

It is an arithmetic number, because the mean of its divisors is an integer number (80872974372).

Almost surely, 2^161745948743 is an apocalyptic number.

161745948743 is a deficient number, since it is larger than the sum of its proper divisors (1).

161745948743 is an equidigital number, since it uses as much as digits as its factorization.

161745948743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 59.

The spelling of 161745948743 in words is "one hundred sixty-one billion, seven hundred forty-five million, nine hundred forty-eight thousand, seven hundred forty-three".