161346180493 has 2 divisors, whose sum is σ = 161346180494. Its totient is φ = 161346180492.

The previous prime is 161346180473. The next prime is 161346180517. The reversal of 161346180493 is 394081643161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122893715844 + 38452464649 = 350562^2 + 196093^2 .

It is an emirp because it is prime and its reverse (394081643161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161346180493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161346180403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80673090246 + 80673090247.

It is an arithmetic number, because the mean of its divisors is an integer number (80673090247).

Almost surely, 2^161346180493 is an apocalyptic number.

It is an amenable number.

161346180493 is a deficient number, since it is larger than the sum of its proper divisors (1).

161346180493 is an equidigital number, since it uses as much as digits as its factorization.

161346180493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 161346180493 in words is "one hundred sixty-one billion, three hundred forty-six million, one hundred eighty thousand, four hundred ninety-three".