165395484593561 has 16 divisors (see below), whose sum is σ = 173947426258944. Its totient is φ = 156956972722704.

The previous prime is 165395484593557. The next prime is 165395484593609.

165395484593561 is nontrivially palindromic in base 10.

165395484593561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165395484593561 - 2² = 165395484593557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165395484593501) 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, 330486026 + ... + 330986108.

It is an arithmetic number, because the mean of its divisors is an integer number (10871714141184).

Almost surely, 2^{165395484593561} is an apocalyptic number.

It is an amenable number.

165395484593561 is a deficient number, since it is larger than the sum of its proper divisors (8551941665383).

165395484593561 is a wasteful number, since it uses less digits than its factorization.

165395484593561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613460.

The product of its digits is 2099520000, while the sum is 74.

The spelling of 165395484593561 in words is "one hundred sixty-five trillion, three hundred ninety-five billion, four hundred eighty-four million, five hundred ninety-three thousand, five hundred sixty-one".