165050565661655 has 4 divisors (see below), whose sum is σ = 198060678793992. Its totient is φ = 132040452529320.

The previous prime is 165050565661571. The next prime is 165050565661717. The reversal of 165050565661655 is 556166565050561.

165050565661655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 165050565661655 - 2¹² = 165050565657559 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 16505056566161 + ... + 16505056566170.

It is an arithmetic number, because the mean of its divisors is an integer number (49515169698498).

Almost surely, 2^{165050565661655} is an apocalyptic number.

165050565661655 is a deficient number, since it is larger than the sum of its proper divisors (33010113132337).

165050565661655 is an equidigital number, since it uses as much as digits as its factorization.

165050565661655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33010113132336.

The product of its (nonzero) digits is 121500000, while the sum is 62.

The spelling of 165050565661655 in words is "one hundred sixty-five trillion, fifty billion, five hundred sixty-five million, six hundred sixty-one thousand, six hundred fifty-five".