8781085857 has 8 divisors (see below), whose sum is σ = 11980396384. Its totient is φ = 5717916288.

The previous prime is 8781085853. The next prime is 8781085879. The reversal of 8781085857 is 7585801878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8781085857 - 2² = 8781085853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8781085797 and 8781085806.

It is not an unprimeable number, because it can be changed into a prime (8781085853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34035088 + ... + 34035345.

It is an arithmetic number, because the mean of its divisors is an integer number (1497549548).

Almost surely, 2^8781085857 is an apocalyptic number.

It is an amenable number.

8781085857 is a deficient number, since it is larger than the sum of its proper divisors (3199310527).

8781085857 is a wasteful number, since it uses less digits than its factorization.

8781085857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68070479.

The product of its (nonzero) digits is 5017600, while the sum is 57.

The square root of 8781085857 is about 93707.4482471911. The cubic root of 8781085857 is about 2063.0800264572.

The spelling of 8781085857 in words is "eight billion, seven hundred eighty-one million, eighty-five thousand, eight hundred fifty-seven".