1862845549321 has 3 divisors (see below), whose sum is σ = 1862846914183. Its totient is φ = 1862844184460.

The previous prime is 1862845549309. The next prime is 1862845549391. The reversal of 1862845549321 is 1239455482681.

The square root of 1862845549321 is 1364861.

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., 855512153721 + 1007333395600 = 924939^2 + 1003660^2 .

It is not a de Polignac number, because 1862845549321 - 2⁷ = 1862845549193 is a prime.

It is a super-2 number, since 2×1862845549321² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1862845549391) 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, 682431 + ... + 2047291.

Almost surely, 2^{1862845549321} is an apocalyptic number.

1862845549321 is the 1364861-st square number.

1862845549321 is the 682431-st centered octagonal number.

It is an amenable number.

1862845549321 is a deficient number, since it is larger than the sum of its proper divisors (1364862).

1862845549321 is an frugal number, since it uses more digits than its factorization.

1862845549321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729722 (or 1364861 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 58.

The spelling of 1862845549321 in words is "one trillion, eight hundred sixty-two billion, eight hundred forty-five million, five hundred forty-nine thousand, three hundred twenty-one".