165655551015005 has 4 divisors (see below), whose sum is σ = 198786661218012. Its totient is φ = 132524440812000.

The previous prime is 165655551014971. The next prime is 165655551015037. The reversal of 165655551015005 is 500510155556561.

165655551015005 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 can be written as a sum of positive squares in 2 ways, for example, as 55347856468996 + 110307694546009 = 7439614^2 + 10502747^2 .

It is not a de Polignac number, because 165655551015005 - 2²⁴ = 165655534237789 is a prime.

It is a Duffinian number.

It is a Curzon 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, 16565555101496 + ... + 16565555101505.

It is an arithmetic number, because the mean of its divisors is an integer number (49696665304503).

Almost surely, 2^{165655551015005} is an apocalyptic number.

It is an amenable number.

165655551015005 is a deficient number, since it is larger than the sum of its proper divisors (33131110203007).

165655551015005 is an equidigital number, since it uses as much as digits as its factorization.

165655551015005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33131110203006.

The product of its (nonzero) digits is 2812500, while the sum is 50.

The spelling of 165655551015005 in words is "one hundred sixty-five trillion, six hundred fifty-five billion, five hundred fifty-one million, fifteen thousand, five".