161378696 has 8 divisors (see below), whose sum is σ = 302585070. Its totient is φ = 80689344.

The previous prime is 161378689. The next prime is 161378713. The reversal of 161378696 is 696873161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 150945796 + 10432900 = 12286^2 + 3230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 161378696.

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 as a sum of consecutive naturals, namely, 10086161 + ... + 10086176.

Almost surely, 2^161378696 is an apocalyptic number.

It is an amenable number.

161378696 is a deficient number, since it is larger than the sum of its proper divisors (141206374).

161378696 is a wasteful number, since it uses less digits than its factorization.

161378696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20172343 (or 20172339 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 161378696 is about 12703.4914885633. The cubic root of 161378696 is about 544.4383811378.

The spelling of 161378696 in words is "one hundred sixty-one million, three hundred seventy-eight thousand, six hundred ninety-six".