818345857 has 16 divisors (see below), whose sum is σ = 958397440. Its totient is φ = 684128592.

The previous prime is 818345837. The next prime is 818345861. The reversal of 818345857 is 758543818.

818345857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 818345857 - 2⁷ = 818345729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 818345857.

It is not an unprimeable number, because it can be changed into a prime (818345837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264244 + ... + 267322.

It is an arithmetic number, because the mean of its divisors is an integer number (59899840).

Almost surely, 2^818345857 is an apocalyptic number.

It is an amenable number.

818345857 is a deficient number, since it is larger than the sum of its proper divisors (140051583).

818345857 is a wasteful number, since it uses less digits than its factorization.

818345857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012.

The product of its digits is 1075200, while the sum is 49.

The square root of 818345857 is about 28606.7449563910. The cubic root of 818345857 is about 935.3603640137.

The spelling of 818345857 in words is "eight hundred eighteen million, three hundred forty-five thousand, eight hundred fifty-seven".