1803418664 has 8 divisors (see below), whose sum is σ = 3381410010. Its totient is φ = 901709328.

The previous prime is 1803418637. The next prime is 1803418691. The reversal of 1803418664 is 4668143081.

It is an interprime number because it is at equal distance from previous prime (1803418637) and next prime (1803418691).

It can be written as a sum of positive squares in only one way, i.e., 1641060100 + 162358564 = 40510^2 + 12742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 112713659 + ... + 112713674.

Almost surely, 2^1803418664 is an apocalyptic number.

It is an amenable number.

1803418664 is a deficient number, since it is larger than the sum of its proper divisors (1577991346).

1803418664 is a wasteful number, since it uses less digits than its factorization.

1803418664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225427339 (or 225427335 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 1803418664 is about 42466.6771009930. The cubic root of 1803418664 is about 1217.2100233782.

The spelling of 1803418664 in words is "one billion, eight hundred three million, four hundred eighteen thousand, six hundred sixty-four".