104042164561 has 4 divisors (see below), whose sum is σ = 104042893824. Its totient is φ = 104041435300.

The previous prime is 104042164553. The next prime is 104042164571. The reversal of 104042164561 is 165461240401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 104042164561 - 2³ = 104042164553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104042164531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72745 + ... + 461926.

It is an arithmetic number, because the mean of its divisors is an integer number (26010723456).

Almost surely, 2^104042164561 is an apocalyptic number.

It is an amenable number.

104042164561 is a deficient number, since it is larger than the sum of its proper divisors (729263).

104042164561 is an equidigital number, since it uses as much as digits as its factorization.

104042164561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729262.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 104042164561 in words is "one hundred four billion, forty-two million, one hundred sixty-four thousand, five hundred sixty-one".