849643341121 has 3 divisors (see below), whose sum is σ = 849644262883. Its totient is φ = 849642419360.

The previous prime is 849643341119. The next prime is 849643341133. The reversal of 849643341121 is 121143346948.

The square root of 849643341121 is 921761.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 740479181121 + 109164160000 = 860511^2 + 330400^2 .

It is not a de Polignac number, because 849643341121 - 2¹ = 849643341119 is a prime.

It is a super-2 number, since 2×849643341121² (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 (849643341721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 460881 + ... + 1382641.

Almost surely, 2^849643341121 is an apocalyptic number.

849643341121 is the 921761-st square number.

849643341121 is the 460881-st centered octagonal number.

It is an amenable number.

849643341121 is a deficient number, since it is larger than the sum of its proper divisors (921762).

849643341121 is an frugal number, since it uses more digits than its factorization.

849643341121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843522 (or 921761 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The spelling of 849643341121 in words is "eight hundred forty-nine billion, six hundred forty-three million, three hundred forty-one thousand, one hundred twenty-one".