104245552561 has 4 divisors (see below), whose sum is σ = 104273723124. Its totient is φ = 104217382000.

The previous prime is 104245552517. The next prime is 104245552571. The reversal of 104245552561 is 165255542401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83428545600 + 20817006961 = 288840^2 + 144281^2 .

It is a cyclic number.

It is not a de Polignac number, because 104245552561 - 2²⁹ = 103708681649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104245552571) 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, 14079730 + ... + 14087131.

It is an arithmetic number, because the mean of its divisors is an integer number (26068430781).

Almost surely, 2^104245552561 is an apocalyptic number.

It is an amenable number.

104245552561 is a deficient number, since it is larger than the sum of its proper divisors (28170563).

104245552561 is an equidigital number, since it uses as much as digits as its factorization.

104245552561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28170562.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 104245552561 in words is "one hundred four billion, two hundred forty-five million, five hundred fifty-two thousand, five hundred sixty-one".