844868418553 has 8 divisors (see below), whose sum is σ = 863851203072. Its totient is φ = 825927586656.

The previous prime is 844868418529. The next prime is 844868418557. The reversal of 844868418553 is 355814868448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-844868418553 is a prime.

It is a super-2 number, since 2×844868418553² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844868418557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10447425 + ... + 10527982.

It is an arithmetic number, because the mean of its divisors is an integer number (107981400384).

Almost surely, 2^844868418553 is an apocalyptic number.

It is an amenable number.

844868418553 is a deficient number, since it is larger than the sum of its proper divisors (18982784519).

844868418553 is a wasteful number, since it uses less digits than its factorization.

844868418553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976311.

The product of its digits is 117964800, while the sum is 64.

The spelling of 844868418553 in words is "eight hundred forty-four billion, eight hundred sixty-eight million, four hundred eighteen thousand, five hundred fifty-three".