2042844861 has 4 divisors (see below), whose sum is σ = 2723793152. Its totient is φ = 1361896572.

The previous prime is 2042844841. The next prime is 2042844877. The reversal of 2042844861 is 1684482402.

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 not a de Polignac number, because 2042844861 - 2¹⁰ = 2042843837 is a prime.

It is a super-2 number, since 2×2042844861² = 8346430252228218642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042844841) 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, 340474141 + ... + 340474146.

It is an arithmetic number, because the mean of its divisors is an integer number (680948288).

Almost surely, 2^2042844861 is an apocalyptic number.

It is an amenable number.

2042844861 is a deficient number, since it is larger than the sum of its proper divisors (680948291).

2042844861 is an equidigital number, since it uses as much as digits as its factorization.

2042844861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680948290.

The product of its (nonzero) digits is 98304, while the sum is 39.

The square root of 2042844861 is about 45197.8413311963. The cubic root of 2042844861 is about 1268.8544159384.

The spelling of 2042844861 in words is "two billion, forty-two million, eight hundred forty-four thousand, eight hundred sixty-one".