817855818114 has 16 divisors (see below), whose sum is σ = 1635826940928. Its totient is φ = 272599388592.

The previous prime is 817855818113. The next prime is 817855818149. The reversal of 817855818114 is 411818558718.

It is not an unprimeable number, because it can be changed into a prime (817855818113) 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 7 ways as a sum of consecutive naturals, for example, 4712017 + ... + 4882500.

It is an arithmetic number, because the mean of its divisors is an integer number (102239183808).

Almost surely, 2^817855818114 is an apocalyptic number.

817855818114 is an abundant number, since it is smaller than the sum of its proper divisors (817971122814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

817855818114 is a wasteful number, since it uses less digits than its factorization.

817855818114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608729.

The product of its digits is 2867200, while the sum is 57.

The spelling of 817855818114 in words is "eight hundred seventeen billion, eight hundred fifty-five million, eight hundred eighteen thousand, one hundred fourteen".