161713050593 has 4 divisors (see below), whose sum is σ = 166083673620. Its totient is φ = 157342427568.

The previous prime is 161713050509. The next prime is 161713050619. The reversal of 161713050593 is 395050317161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151984581904 + 9728468689 = 389852^2 + 98633^2 .

It is a cyclic number.

It is not a de Polignac number, because 161713050593 - 2¹⁰ = 161713049569 is a prime.

It is a super-2 number, since 2×161713050593² (a number of 23 digits) contains 22 as substring.

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 161713050593.

It is not an unprimeable number, because it can be changed into a prime (161713050193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185311458 + ... + 2185311531.

It is an arithmetic number, because the mean of its divisors is an integer number (41520918405).

Almost surely, 2^161713050593 is an apocalyptic number.

It is an amenable number.

161713050593 is a deficient number, since it is larger than the sum of its proper divisors (4370623027).

161713050593 is an equidigital number, since it uses as much as digits as its factorization.

161713050593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370623026.

The product of its (nonzero) digits is 85050, while the sum is 41.

The spelling of 161713050593 in words is "one hundred sixty-one billion, seven hundred thirteen million, fifty thousand, five hundred ninety-three".