161773794 has 96 divisors (see below), whose sum is σ = 450455040. Its totient is φ = 42656544.

The previous prime is 161773763. The next prime is 161773831. The reversal of 161773794 is 497377161.

It is a happy number.

161773794 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 32047 + ... + 36749.

It is an arithmetic number, because the mean of its divisors is an integer number (4692240).

Almost surely, 2^161773794 is an apocalyptic number.

161773794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161773794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225227520).

161773794 is an abundant number, since it is smaller than the sum of its proper divisors (288681246).

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

161773794 is a wasteful number, since it uses less digits than its factorization.

161773794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741 (or 4728 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 161773794 is about 12719.0327462429. The cubic root of 161773794 is about 544.8823290550.

The spelling of 161773794 in words is "one hundred sixty-one million, seven hundred seventy-three thousand, seven hundred ninety-four".