849944136889 has 4 divisors (see below), whose sum is σ = 849946012240. Its totient is φ = 849942261540.

The previous prime is 849944136887. The next prime is 849944136989. The reversal of 849944136889 is 988631449948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849944136889 - 2¹ = 849944136887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849944136887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212122 + ... + 1320940.

It is an arithmetic number, because the mean of its divisors is an integer number (212486503060).

Almost surely, 2^849944136889 is an apocalyptic number.

It is an amenable number.

849944136889 is a deficient number, since it is larger than the sum of its proper divisors (1875351).

849944136889 is a wasteful number, since it uses less digits than its factorization.

849944136889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875350.

The product of its digits is 429981696, while the sum is 73.

The spelling of 849944136889 in words is "eight hundred forty-nine billion, nine hundred forty-four million, one hundred thirty-six thousand, eight hundred eighty-nine".