161706338688 has 32 divisors (see below), whose sum is σ = 429532463160. Its totient is φ = 53902112768.

The previous prime is 161706338669. The next prime is 161706338749. The reversal of 161706338688 is 886833607161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×161706338688² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210554745 + ... + 210555512.

Almost surely, 2^161706338688 is an apocalyptic number.

It is an amenable number.

161706338688 is an abundant number, since it is smaller than the sum of its proper divisors (267826124472).

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

161706338688 is an equidigital number, since it uses as much as digits as its factorization.

161706338688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421110274 (or 421110262 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 161706338688 in words is "one hundred sixty-one billion, seven hundred six million, three hundred thirty-eight thousand, six hundred eighty-eight".