1655663646 has 48 divisors (see below), whose sum is σ = 4148265744. Its totient is φ = 436657536.

The previous prime is 1655663627. The next prime is 1655663651. The reversal of 1655663646 is 6463665561.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1655663595 and 1655663604.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 212775 + ... + 220418.

It is an arithmetic number, because the mean of its divisors is an integer number (86422203).

Almost surely, 2^1655663646 is an apocalyptic number.

1655663646 is an abundant number, since it is smaller than the sum of its proper divisors (2492602098).

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

1655663646 is a wasteful number, since it uses less digits than its factorization.

1655663646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433225 (or 433218 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 48.

The square root of 1655663646 is about 40689.8469645684. The cubic root of 1655663646 is about 1183.0162340361.

The spelling of 1655663646 in words is "one billion, six hundred fifty-five million, six hundred sixty-three thousand, six hundred forty-six".