104857612521 has 16 divisors (see below), whose sum is σ = 140865979584. Its totient is φ = 69377416704.

The previous prime is 104857612511. The next prime is 104857612543. The reversal of 104857612521 is 125216758401.

It is a happy number.

It is not a de Polignac number, because 104857612521 - 2⁷ = 104857612393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (104857612511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726350 + ... + 1786056.

It is an arithmetic number, because the mean of its divisors is an integer number (8804123724).

Almost surely, 2^104857612521 is an apocalyptic number.

It is an amenable number.

104857612521 is a deficient number, since it is larger than the sum of its proper divisors (36008367063).

104857612521 is a wasteful number, since it uses less digits than its factorization.

104857612521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64120.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 104857612521 in words is "one hundred four billion, eight hundred fifty-seven million, six hundred twelve thousand, five hundred twenty-one".