161708009696 has 24 divisors (see below), whose sum is σ = 318403305360. Its totient is φ = 80843678208.

The previous prime is 161708009647. The next prime is 161708009699. The reversal of 161708009696 is 696900807161.

It is a super-3 number, since 3×161708009696³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161708009699) 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, 65081 + ... + 572408.

It is an arithmetic number, because the mean of its divisors is an integer number (13266804390).

Almost surely, 2^161708009696 is an apocalyptic number.

161708009696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161708009696 is a deficient number, since it is larger than the sum of its proper divisors (156695295664).

161708009696 is an equidigital number, since it uses as much as digits as its factorization.

161708009696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645426 (or 645418 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 161708009696 in words is "one hundred sixty-one billion, seven hundred eight million, nine thousand, six hundred ninety-six".