1808117946 has 12 divisors (see below), whose sum is σ = 3917588922. Its totient is φ = 602705976.

The previous prime is 1808117939. The next prime is 1808117963. The reversal of 1808117946 is 6497118081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1148193225 + 659924721 = 33885^2 + 25689^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 50225481 + ... + 50225516.

Almost surely, 2^1808117946 is an apocalyptic number.

1808117946 is an abundant number, since it is smaller than the sum of its proper divisors (2109470976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1808117946 is a wasteful number, since it uses less digits than its factorization.

1808117946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100451005 (or 100451002 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1808117946 is about 42521.9701566143. The cubic root of 1808117946 is about 1218.2663600855.

The spelling of 1808117946 in words is "one billion, eight hundred eight million, one hundred seventeen thousand, nine hundred forty-six".