1810742849 has 8 divisors (see below), whose sum is σ = 1856721192. Its totient is φ = 1765290240.

The previous prime is 1810742833. The next prime is 1810742911. The reversal of 1810742849 is 9482470181.

It can be written as a sum of positive squares in 4 ways, for example, as 361570225 + 1449172624 = 19015^2 + 38068^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1810742849 - 2⁴ = 1810742833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1810742809) 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 7 ways as a sum of consecutive naturals, for example, 124454 + ... + 138239.

It is an arithmetic number, because the mean of its divisors is an integer number (232090149).

Almost surely, 2^1810742849 is an apocalyptic number.

It is an amenable number.

1810742849 is a deficient number, since it is larger than the sum of its proper divisors (45978343).

1810742849 is a wasteful number, since it uses less digits than its factorization.

1810742849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262867.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1810742849 is about 42552.8242188459. The cubic root of 1810742849 is about 1218.8556071923.

The spelling of 1810742849 in words is "one billion, eight hundred ten million, seven hundred forty-two thousand, eight hundred forty-nine".