169428446818 has 16 divisors (see below), whose sum is σ = 256665671640. Its totient is φ = 83874825216.

The previous prime is 169428446809. The next prime is 169428446833. The reversal of 169428446818 is 818644824961.

It can be written as a sum of positive squares in 4 ways, for example, as 73534795929 + 95893650889 = 271173^2 + 309667^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188283 + ... + 611806.

Almost surely, 2^169428446818 is an apocalyptic number.

169428446818 is a deficient number, since it is larger than the sum of its proper divisors (87237224822).

169428446818 is a wasteful number, since it uses less digits than its factorization.

169428446818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801141.

The product of its digits is 21233664, while the sum is 61.

The spelling of 169428446818 in words is "one hundred sixty-nine billion, four hundred twenty-eight million, four hundred forty-six thousand, eight hundred eighteen".