12104040745561 has 8 divisors (see below), whose sum is σ = 12212414685000. Its totient is φ = 11996028656640.

The previous prime is 12104040745543. The next prime is 12104040745627. The reversal of 12104040745561 is 16554704040121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3514803797961 + 8589236947600 = 1874781^2 + 2930740^2 .

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 12104040745561 - 2⁵ = 12104040745529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12104040745541) 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, 90395430 + ... + 90529231.

It is an arithmetic number, because the mean of its divisors is an integer number (1526551835625).

Almost surely, 2^{12104040745561} is an apocalyptic number.

It is an amenable number.

12104040745561 is a deficient number, since it is larger than the sum of its proper divisors (108373939439).

12104040745561 is a wasteful number, since it uses less digits than its factorization.

12104040745561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180925259.

The product of its (nonzero) digits is 134400, while the sum is 40.

Adding to 12104040745561 its reverse (16554704040121), we get a palindrome (28658744785682).

The spelling of 12104040745561 in words is "twelve trillion, one hundred four billion, forty million, seven hundred forty-five thousand, five hundred sixty-one".