655803643 has 8 divisors (see below), whose sum is σ = 730644480. Its totient is φ = 583499880.

The previous prime is 655803613. The next prime is 655803647. The reversal of 655803643 is 346308556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655803643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 655803596 and 655803605.

It is not an unprimeable number, because it can be changed into a prime (655803647) 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 in 7 ways as a sum of consecutive naturals, for example, 633723 + ... + 634756.

It is an arithmetic number, because the mean of its divisors is an integer number (91330560).

Almost surely, 2^655803643 is an apocalyptic number.

655803643 is a deficient number, since it is larger than the sum of its proper divisors (74840837).

655803643 is a wasteful number, since it uses less digits than its factorization.

655803643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268537.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 655803643 is about 25608.6634364232. The cubic root of 655803643 is about 868.8095944626.

The spelling of 655803643 in words is "six hundred fifty-five million, eight hundred three thousand, six hundred forty-three".