8100408857 has 4 divisors (see below), whose sum is σ = 8100589860. Its totient is φ = 8100227856.

The previous prime is 8100408851. The next prime is 8100408881. The reversal of 8100408857 is 7588040018.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 108764041 + 7991644816 = 10429^2 + 89396^2 .

It is a cyclic number.

It is not a de Polignac number, because 8100408857 - 2⁸ = 8100408601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8100408851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31019 + ... + 131007.

It is an arithmetic number, because the mean of its divisors is an integer number (2025147465).

Almost surely, 2^8100408857 is an apocalyptic number.

It is an amenable number.

8100408857 is a deficient number, since it is larger than the sum of its proper divisors (181003).

8100408857 is an equidigital number, since it uses as much as digits as its factorization.

8100408857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181002.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 8100408857 is about 90002.2713991153. The cubic root of 8100408857 is about 2008.3326400913.

The spelling of 8100408857 in words is "eight billion, one hundred million, four hundred eight thousand, eight hundred fifty-seven".