161580539675 has 6 divisors (see below), whose sum is σ = 200359869228. Its totient is φ = 129264431720.

The previous prime is 161580539671. The next prime is 161580539677. The reversal of 161580539675 is 576935085161.

It is not a de Polignac number, because 161580539675 - 2² = 161580539671 is a prime.

It is a super-2 number, since 2×161580539675² (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 161580539675.

It is not an unprimeable number, because it can be changed into a prime (161580539671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3231610769 + ... + 3231610818.

It is an arithmetic number, because the mean of its divisors is an integer number (33393311538).

Almost surely, 2^161580539675 is an apocalyptic number.

161580539675 is a deficient number, since it is larger than the sum of its proper divisors (38779329553).

161580539675 is an equidigital number, since it uses as much as digits as its factorization.

161580539675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463221597 (or 6463221592 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 161580539675 in words is "one hundred sixty-one billion, five hundred eighty million, five hundred thirty-nine thousand, six hundred seventy-five".