1809652274 has 4 divisors (see below), whose sum is σ = 2714478414. Its totient is φ = 904826136.

The previous prime is 1809652267. The next prime is 1809652279. The reversal of 1809652274 is 4722569081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4722569081 = 53 ⋅89105077.

It can be written as a sum of positive squares in only one way, i.e., 1638225625 + 171426649 = 40475^2 + 13093^2 .

It is not an unprimeable number, because it can be changed into a prime (1809652279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452413067 + ... + 452413070.

Almost surely, 2^1809652274 is an apocalyptic number.

1809652274 is a deficient number, since it is larger than the sum of its proper divisors (904826140).

1809652274 is an equidigital number, since it uses as much as digits as its factorization.

1809652274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904826139.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1809652274 is about 42540.0079219551. The cubic root of 1809652274 is about 1218.6108604198.

The spelling of 1809652274 in words is "one billion, eight hundred nine million, six hundred fifty-two thousand, two hundred seventy-four".