840344801063 has 4 divisors (see below), whose sum is σ = 876881531568. Its totient is φ = 803808070560.

The previous prime is 840344800991. The next prime is 840344801081. The reversal of 840344801063 is 360108443048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840344801063 - 2¹⁴ = 840344784679 is a prime.

It is a super-2 number, since 2×840344801063² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840344801063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840344801663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18268365218 + ... + 18268365263.

It is an arithmetic number, because the mean of its divisors is an integer number (219220382892).

Almost surely, 2^840344801063 is an apocalyptic number.

840344801063 is a deficient number, since it is larger than the sum of its proper divisors (36536730505).

840344801063 is a wasteful number, since it uses less digits than its factorization.

840344801063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36536730504.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 840344801063 in words is "eight hundred forty billion, three hundred forty-four million, eight hundred one thousand, sixty-three".