161916692 has 48 divisors (see below), whose sum is σ = 336311808. Its totient is φ = 66769920.

The previous prime is 161916691. The next prime is 161916719. The reversal of 161916692 is 296619161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161916691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79268 + ... + 81284.

It is an arithmetic number, because the mean of its divisors is an integer number (7006496).

Almost surely, 2^161916692 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 161916692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168155904).

161916692 is an abundant number, since it is smaller than the sum of its proper divisors (174395116).

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

161916692 is a wasteful number, since it uses less digits than its factorization.

161916692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2134 counting only the distinct ones).

The product of its digits is 34992, while the sum is 41.

The square root of 161916692 is about 12724.6489931943. The cubic root of 161916692 is about 545.0427169615.

The spelling of 161916692 in words is "one hundred sixty-one million, nine hundred sixteen thousand, six hundred ninety-two".