840544243344 has 315 divisors, whose sum is σ = 2648042140107. Its totient is φ = 258232935168.

The previous prime is 840544243321. The next prime is 840544243379. The reversal of 840544243344 is 443342445048.

The square root of 840544243344 is 916812.

It is a perfect power (a square), and thus also a powerful number.

840544243344 is a `hidden beast` number, since 8 + 40 + 544 + 24 + 3 + 3 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 326283148944 + 514261094400 = 571212^2 + 717120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 840544243344.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 1287203722 + ... + 1287204374.

Almost surely, 2^840544243344 is an apocalyptic number.

840544243344 is the 916812-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840544243344

840544243344 is an abundant number, since it is smaller than the sum of its proper divisors (1807497896763).

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

840544243344 is an frugal number, since it uses more digits than its factorization.

840544243344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 45.

The spelling of 840544243344 in words is "eight hundred forty billion, five hundred forty-four million, two hundred forty-three thousand, three hundred forty-four".