165575575561 has 8 divisors (see below), whose sum is σ = 180631158048. Its totient is φ = 150520536000.

The previous prime is 165575575483. The next prime is 165575575579.

165575575561 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165575575561 - 2⁹ = 165575575049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165575575496 and 165575575505.

It is not an unprimeable number, because it can be changed into a prime (165575575591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757606 + ... + 951376.

It is an arithmetic number, because the mean of its divisors is an integer number (22578894756).

Almost surely, 2^165575575561 is an apocalyptic number.

165575575561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165575575561 is a deficient number, since it is larger than the sum of its proper divisors (15055582487).

165575575561 is a wasteful number, since it uses less digits than its factorization.

165575575561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271463.

The product of its digits is 27562500, while the sum is 58.

The spelling of 165575575561 in words is "one hundred sixty-five billion, five hundred seventy-five million, five hundred seventy-five thousand, five hundred sixty-one".