104440043261 has 4 divisors (see below), whose sum is σ = 104695398300. Its totient is φ = 104184688224.

The previous prime is 104440043231. The next prime is 104440043273. The reversal of 104440043261 is 162340044401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162340044401 = 3253 ⋅49904717.

It can be written as a sum of positive squares in 2 ways, for example, as 98041003225 + 6399040036 = 313115^2 + 79994^2 .

It is a cyclic number.

It is not a de Polignac number, because 104440043261 - 2¹⁰ = 104440042237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104440043231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127676906 + ... + 127677723.

It is an arithmetic number, because the mean of its divisors is an integer number (26173849575).

Almost surely, 2^104440043261 is an apocalyptic number.

It is an amenable number.

104440043261 is a deficient number, since it is larger than the sum of its proper divisors (255355039).

104440043261 is an equidigital number, since it uses as much as digits as its factorization.

104440043261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255355038.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 104440043261 its reverse (162340044401), we get a palindrome (266780087662).

The spelling of 104440043261 in words is "one hundred four billion, four hundred forty million, forty-three thousand, two hundred sixty-one".