840853702818 has 64 divisors (see below), whose sum is σ = 1922571987840. Its totient is φ = 272243577600.

The previous prime is 840853702811. The next prime is 840853702837. The reversal of 840853702818 is 818207358048.

840853702818 is a `hidden beast` number, since 84 + 0 + 8 + 537 + 0 + 28 + 1 + 8 = 666.

It is a super-2 number, since 2×840853702818² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (840853702811) 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 31 ways as a sum of consecutive naturals, for example, 333963 + ... + 1339118.

It is an arithmetic number, because the mean of its divisors is an integer number (30040187310).

Almost surely, 2^840853702818 is an apocalyptic number.

840853702818 is an abundant number, since it is smaller than the sum of its proper divisors (1081718285022).

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

840853702818 is a wasteful number, since it uses less digits than its factorization.

840853702818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673360 (or 1673354 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The spelling of 840853702818 in words is "eight hundred forty billion, eight hundred fifty-three million, seven hundred two thousand, eight hundred eighteen".