104603205661 has 4 divisors (see below), whose sum is σ = 104608642300. Its totient is φ = 104597769024.

The previous prime is 104603205647. The next prime is 104603205673. The reversal of 104603205661 is 166502306401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166502306401 = 311 ⋅535377191.

It can be written as a sum of positive squares in 2 ways, for example, as 10434622500 + 94168583161 = 102150^2 + 306869^2 .

It is a cyclic number.

It is not a de Polignac number, because 104603205661 - 2¹⁹ = 104602681373 is a prime.

It is a super-3 number, since 3×104603205661³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104603205691) 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, 2689356 + ... + 2727973.

It is an arithmetic number, because the mean of its divisors is an integer number (26152160575).

Almost surely, 2^104603205661 is an apocalyptic number.

It is an amenable number.

104603205661 is a deficient number, since it is larger than the sum of its proper divisors (5436639).

104603205661 is an equidigital number, since it uses as much as digits as its factorization.

104603205661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436638.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 104603205661 in words is "one hundred four billion, six hundred three million, two hundred five thousand, six hundred sixty-one".