169381648 has 20 divisors (see below), whose sum is σ = 330272140. Its totient is φ = 84150144.

The previous prime is 169381643. The next prime is 169381649. The reversal of 169381648 is 846183961.

It can be written as a sum of positive squares in 2 ways, for example, as 16908544 + 152473104 = 4112^2 + 12348^2 .

It is a junction number, because it is equal to n+sod(n) for n = 169381598 and 169381607.

It is not an unprimeable number, because it can be changed into a prime (169381643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31203 + ... + 36226.

It is an arithmetic number, because the mean of its divisors is an integer number (16513607).

Almost surely, 2^169381648 is an apocalyptic number.

It is an amenable number.

169381648 is a deficient number, since it is larger than the sum of its proper divisors (160890492).

169381648 is a wasteful number, since it uses less digits than its factorization.

169381648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67594 (or 67588 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 169381648 is about 13014.6704914108. The cubic root of 169381648 is about 553.2933510892.

The spelling of 169381648 in words is "one hundred sixty-nine million, three hundred eighty-one thousand, six hundred forty-eight".