161783808 has 112 divisors (see below), whose sum is σ = 448238880. Its totient is φ = 51838976.

The previous prime is 161783777. The next prime is 161783833. The reversal of 161783808 is 808387161.

It is a self number, because there is not a number n which added to its sum of digits gives 161783808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712591 + ... + 712817.

Almost surely, 2^161783808 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 161783808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224119440).

161783808 is an abundant number, since it is smaller than the sum of its proper divisors (286455072).

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

161783808 is an equidigital number, since it uses as much as digits as its factorization.

161783808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 161783808 is about 12719.4264021614. The cubic root of 161783808 is about 544.8935717887.

The spelling of 161783808 in words is "one hundred sixty-one million, seven hundred eighty-three thousand, eight hundred eight".