840312555894 has 48 divisors (see below), whose sum is σ = 2190288372480. Its totient is φ = 227453022000.

The previous prime is 840312555839. The next prime is 840312555917. The reversal of 840312555894 is 498555213048.

840312555894 is a `hidden beast` number, since 8 + 4 + 0 + 3 + 1 + 2 + 55 + 589 + 4 = 666.

It is a super-2 number, since 2×840312555894² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 840312555894.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 175501482 + ... + 175506269.

It is an arithmetic number, because the mean of its divisors is an integer number (45631007760).

Almost surely, 2^840312555894 is an apocalyptic number.

840312555894 is an abundant number, since it is smaller than the sum of its proper divisors (1349975816586).

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

840312555894 is a wasteful number, since it uses less digits than its factorization.

840312555894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351007785 (or 351007782 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The spelling of 840312555894 in words is "eight hundred forty billion, three hundred twelve million, five hundred fifty-five thousand, eight hundred ninety-four".