161741706 has 64 divisors (see below), whose sum is σ = 393154560. Its totient is φ = 43303680.

The previous prime is 161741693. The next prime is 161741719. The reversal of 161741706 is 607147161.

It is an interprime number because it is at equal distance from previous prime (161741693) and next prime (161741719).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256011 + ... + 256641.

It is an arithmetic number, because the mean of its divisors is an integer number (6143040).

Almost surely, 2^161741706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161741706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196577280).

161741706 is an abundant number, since it is smaller than the sum of its proper divisors (231412854).

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

161741706 is a wasteful number, since it uses less digits than its factorization.

161741706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 161741706 is about 12717.7712670106. The cubic root of 161741706 is about 544.8463006809.

Adding to 161741706 its reverse (607147161), we get a palindrome (768888867).

The spelling of 161741706 in words is "one hundred sixty-one million, seven hundred forty-one thousand, seven hundred six".