161669668616958 has 32 divisors (see below), whose sum is σ = 323450120448000. Its totient is φ = 53871426442656.

The previous prime is 161669668616947. The next prime is 161669668616983. The reversal of 161669668616958 is 859616866966161.

It is a super-2 number, since 2×161669668616958² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408227243 + ... + 1408342041.

It is an arithmetic number, because the mean of its divisors is an integer number (10107816264000).

Almost surely, 2^{161669668616958} is an apocalyptic number.

161669668616958 is an abundant number, since it is smaller than the sum of its proper divisors (161780451831042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161669668616958 is a wasteful number, since it uses less digits than its factorization.

161669668616958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193176.

The product of its digits is 7255941120, while the sum is 84.

The spelling of 161669668616958 in words is "one hundred sixty-one trillion, six hundred sixty-nine billion, six hundred sixty-eight million, six hundred sixteen thousand, nine hundred fifty-eight".