10817585857 has 4 divisors (see below), whose sum is σ = 11649707860. Its totient is φ = 9985463856.

The previous prime is 10817585851. The next prime is 10817585879. The reversal of 10817585857 is 75858571801.

It is a happy number.

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 689377536 + 10128208321 = 26256^2 + 100639^2 .

It is a cyclic number.

It is not a de Polignac number, because 10817585857 - 2¹¹ = 10817583809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10817585798 and 10817585807.

It is not an unprimeable number, because it can be changed into a prime (10817585851) 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 3 ways as a sum of consecutive naturals, for example, 416060982 + ... + 416061007.

It is an arithmetic number, because the mean of its divisors is an integer number (2912426965).

Almost surely, 2^10817585857 is an apocalyptic number.

It is an amenable number.

10817585857 is a deficient number, since it is larger than the sum of its proper divisors (832122003).

10817585857 is an equidigital number, since it uses as much as digits as its factorization.

10817585857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832122002.

The product of its (nonzero) digits is 3136000, while the sum is 55.

The spelling of 10817585857 in words is "ten billion, eight hundred seventeen million, five hundred eighty-five thousand, eight hundred fifty-seven".