818670020800 has 42 divisors (see below), whose sum is σ = 2014439923868. Its totient is φ = 327468007680.

The previous prime is 818670020797. The next prime is 818670020801. The reversal of 818670020800 is 8020076818.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (818670020801) 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 5 ways as a sum of consecutive naturals, for example, 255832782 + ... + 255835981.

Almost surely, 2^818670020800 is an apocalyptic number.

818670020800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

818670020800 is an abundant number, since it is smaller than the sum of its proper divisors (1195769903068).

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

818670020800 is a wasteful number, since it uses less digits than its factorization.

818670020800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511668785 (or 511668770 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 818670020800 in words is "eight hundred eighteen billion, six hundred seventy million, twenty thousand, eight hundred".