165280063805 has 8 divisors (see below), whose sum is σ = 205175251800. Its totient is φ = 127664600896.

The previous prime is 165280063769. The next prime is 165280063843. The reversal of 165280063805 is 508360082561.

It can be written as a sum of positive squares in 4 ways, for example, as 64372823524 + 100907240281 = 253718^2 + 317659^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 165280063805 - 2¹⁶ = 165279998269 is a prime.

It is a congruent number.

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, 569931110 + ... + 569931399.

It is an arithmetic number, because the mean of its divisors is an integer number (25646906475).

Almost surely, 2^165280063805 is an apocalyptic number.

It is an amenable number.

165280063805 is a deficient number, since it is larger than the sum of its proper divisors (39895187995).

165280063805 is a wasteful number, since it uses less digits than its factorization.

165280063805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139862543.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 165280063805 in words is "one hundred sixty-five billion, two hundred eighty million, sixty-three thousand, eight hundred five".