161846658 has 48 divisors (see below), whose sum is σ = 361608000. Its totient is φ = 52278048.

The previous prime is 161846611. The next prime is 161846689. The reversal of 161846658 is 856648161.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324093 + ... + 324591.

It is an arithmetic number, because the mean of its divisors is an integer number (7533500).

Almost surely, 2^161846658 is an apocalyptic number.

161846658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161846658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180804000).

161846658 is an abundant number, since it is smaller than the sum of its proper divisors (199761342).

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

161846658 is a wasteful number, since it uses less digits than its factorization.

161846658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1028 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 161846658 is about 12721.8967925384. The cubic root of 161846658 is about 544.9641229925.

The spelling of 161846658 in words is "one hundred sixty-one million, eight hundred forty-six thousand, six hundred fifty-eight".