165505050000505 has 16 divisors (see below), whose sum is σ = 199326020460480. Its totient is φ = 131924151678528.

The previous prime is 165505050000463. The next prime is 165505050000509. The reversal of 165505050000505 is 505000050505561.

It is a cyclic number.

It is not a de Polignac number, because 165505050000505 - 2¹³ = 165505049992313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165505050000509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10208539 + ... + 20862031.

It is an arithmetic number, because the mean of its divisors is an integer number (12457876278780).

Almost surely, 2^{165505050000505} is an apocalyptic number.

It is an amenable number.

165505050000505 is a deficient number, since it is larger than the sum of its proper divisors (33820970459975).

165505050000505 is a wasteful number, since it uses less digits than its factorization.

165505050000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664760.

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 165505050000505 in words is "one hundred sixty-five trillion, five hundred five billion, fifty million, five hundred five", and thus it is an aban number.