104863651985 has 4 divisors (see below), whose sum is σ = 125836382388. Its totient is φ = 83890921584.

The previous prime is 104863651943. The next prime is 104863651999. The reversal of 104863651985 is 589156368401.

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 58122941569 + 46740710416 = 241087^2 + 216196^2 .

It is a cyclic number.

It is not a de Polignac number, because 104863651985 - 2⁸ = 104863651729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104863651985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10486365194 + ... + 10486365203.

It is an arithmetic number, because the mean of its divisors is an integer number (31459095597).

Almost surely, 2^104863651985 is an apocalyptic number.

It is an amenable number.

104863651985 is a deficient number, since it is larger than the sum of its proper divisors (20972730403).

104863651985 is an equidigital number, since it uses as much as digits as its factorization.

104863651985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20972730402.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 104863651985 in words is "one hundred four billion, eight hundred sixty-three million, six hundred fifty-one thousand, nine hundred eighty-five".