161741368546564 has 81 divisors (see below), whose sum is σ = 299586680621319. Its totient is φ = 76399641988560.

The previous prime is 161741368546561. The next prime is 161741368546567. The reversal of 161741368546564 is 465645863147161.

It is a happy number.

The square root of 161741368546564 is 12717758.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (161741368546561) and next prime (161741368546567).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161741368546564.

It is not an unprimeable number, because it can be changed into a prime (161741368546561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48556398379 + ... + 48556401709.

Almost surely, 2^{161741368546564} is an apocalyptic number.

161741368546564 is the 12717758-th square number.

It is an amenable number.

161741368546564 is a deficient number, since it is larger than the sum of its proper divisors (137845312074755).

161741368546564 is an frugal number, since it uses more digits than its factorization.

161741368546564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6878 (or 3439 counting only the distinct ones).

The product of its digits is 348364800, while the sum is 67.

The spelling of 161741368546564 in words is "one hundred sixty-one trillion, seven hundred forty-one billion, three hundred sixty-eight million, five hundred forty-six thousand, five hundred sixty-four".