104747488561 has 4 divisors (see below), whose sum is σ = 105003595300. Its totient is φ = 104491381824.

The previous prime is 104747488459. The next prime is 104747488589. The reversal of 104747488561 is 165884747401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165884747401 = 19 ⋅8730776179.

It can be written as a sum of positive squares in 2 ways, for example, as 51231606336 + 53515882225 = 226344^2 + 231335^2 .

It is a cyclic number.

It is not a de Polignac number, because 104747488561 - 2⁹ = 104747488049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104747488591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128052756 + ... + 128053573.

It is an arithmetic number, because the mean of its divisors is an integer number (26250898825).

Almost surely, 2^104747488561 is an apocalyptic number.

It is an amenable number.

104747488561 is a deficient number, since it is larger than the sum of its proper divisors (256106739).

104747488561 is an equidigital number, since it uses as much as digits as its factorization.

104747488561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256106738.

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 104747488561 in words is "one hundred four billion, seven hundred forty-seven million, four hundred eighty-eight thousand, five hundred sixty-one".