104685634561 has 4 divisors (see below), whose sum is σ = 105142777300. Its totient is φ = 104228491824.

The previous prime is 104685634489. The next prime is 104685634583. The reversal of 104685634561 is 165436586401.

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 95021761536 + 9663873025 = 308256^2 + 98305^2 .

It is a cyclic number.

It is not a de Polignac number, because 104685634561 - 2¹⁹ = 104685110273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104685634661) 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, 228571026 + ... + 228571483.

It is an arithmetic number, because the mean of its divisors is an integer number (26285694325).

Almost surely, 2^104685634561 is an apocalyptic number.

It is an amenable number.

104685634561 is a deficient number, since it is larger than the sum of its proper divisors (457142739).

104685634561 is an equidigital number, since it uses as much as digits as its factorization.

104685634561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457142738.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 104685634561 in words is "one hundred four billion, six hundred eighty-five million, six hundred thirty-four thousand, five hundred sixty-one".