165364463561 has 8 divisors (see below), whose sum is σ = 189892207200. Its totient is φ = 142419155040.

The previous prime is 165364463543. The next prime is 165364463573.

165364463561 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 165364463561 - 2²⁶ = 165297354697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165364463581) 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, 395608556 + ... + 395608973.

It is an arithmetic number, because the mean of its divisors is an integer number (23736525900).

Almost surely, 2^165364463561 is an apocalyptic number.

165364463561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165364463561 is a deficient number, since it is larger than the sum of its proper divisors (24527743639).

165364463561 is a wasteful number, since it uses less digits than its factorization.

165364463561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791217559.

The product of its digits is 4665600, while the sum is 50.

The spelling of 165364463561 in words is "one hundred sixty-five billion, three hundred sixty-four million, four hundred sixty-three thousand, five hundred sixty-one".