161708512 has 72 divisors (see below), whose sum is σ = 372281616. Its totient is φ = 67731456.

The previous prime is 161708489. The next prime is 161708513. The reversal of 161708512 is 215807161.

161708512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161708512² = 52299285706508288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161708513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629088 + ... + 629344.

It is an arithmetic number, because the mean of its divisors is an integer number (5170578).

Almost surely, 2^161708512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161708512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186140808).

161708512 is an abundant number, since it is smaller than the sum of its proper divisors (210573104).

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

161708512 is an equidigital number, since it uses as much as digits as its factorization.

161708512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 161708512 is about 12716.4661757896. The cubic root of 161708512 is about 544.8090254765.

The spelling of 161708512 in words is "one hundred sixty-one million, seven hundred eight thousand, five hundred twelve".