1813403656 has 32 divisors (see below), whose sum is σ = 3436012800. Its totient is φ = 897174720.

The previous prime is 1813403593. The next prime is 1813403659. The reversal of 1813403656 is 6563043181.

It is not an unprimeable number, because it can be changed into a prime (1813403659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388585 + ... + 393223.

It is an arithmetic number, because the mean of its divisors is an integer number (107375400).

Almost surely, 2^1813403656 is an apocalyptic number.

It is an amenable number.

1813403656 is a deficient number, since it is larger than the sum of its proper divisors (1622609144).

1813403656 is a wasteful number, since it uses less digits than its factorization.

1813403656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149 (or 5145 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1813403656 is about 42584.0774938239. The cubic root of 1813403656 is about 1219.4523332411.

The spelling of 1813403656 in words is "one billion, eight hundred thirteen million, four hundred three thousand, six hundred fifty-six".