165081728858 has 8 divisors (see below), whose sum is σ = 251014683828. Its totient is φ = 81410167584.

The previous prime is 165081728849. The next prime is 165081728869. The reversal of 165081728858 is 858827180561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 164792966809 + 288762049 = 405947^2 + 16993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 165081728797 and 165081728806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565348241 + ... + 565348532.

Almost surely, 2^165081728858 is an apocalyptic number.

165081728858 is a deficient number, since it is larger than the sum of its proper divisors (85932954970).

165081728858 is a wasteful number, since it uses less digits than its factorization.

165081728858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130696848.

The product of its (nonzero) digits is 8601600, while the sum is 59.

The spelling of 165081728858 in words is "one hundred sixty-five billion, eighty-one million, seven hundred twenty-eight thousand, eight hundred fifty-eight".