161705500706 has 8 divisors (see below), whose sum is σ = 249113879580. Its totient is φ = 78667540848.

The previous prime is 161705500703. The next prime is 161705500711. The reversal of 161705500706 is 607005507161.

It can be written as a sum of positive squares in 2 ways, for example, as 159900015625 + 1805485081 = 399875^2 + 42491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161705500706² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161705500706.

It is not an unprimeable number, because it can be changed into a prime (161705500703) 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, 1092604661 + ... + 1092604808.

Almost surely, 2^161705500706 is an apocalyptic number.

161705500706 is a deficient number, since it is larger than the sum of its proper divisors (87408378874).

161705500706 is a wasteful number, since it uses less digits than its factorization.

161705500706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185209508.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 161705500706 in words is "one hundred sixty-one billion, seven hundred five million, five hundred thousand, seven hundred six".