165280063999 has 4 divisors (see below), whose sum is σ = 165281637664. Its totient is φ = 165278490336.

The previous prime is 165280063981. The next prime is 165280064023. The reversal of 165280063999 is 999360082561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165280063999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165280063499) 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, 617082 + ... + 843415.

It is an arithmetic number, because the mean of its divisors is an integer number (41320409416).

Almost surely, 2^165280063999 is an apocalyptic number.

165280063999 is a deficient number, since it is larger than the sum of its proper divisors (1573665).

165280063999 is a wasteful number, since it uses less digits than its factorization.

165280063999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573664.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 165280063999 in words is "one hundred sixty-five billion, two hundred eighty million, sixty-three thousand, nine hundred ninety-nine".