655840505 has 8 divisors (see below), whose sum is σ = 788164992. Its totient is φ = 523901488.

The previous prime is 655840489. The next prime is 655840511. The reversal of 655840505 is 505048556.

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

It is a cyclic number.

It is not a de Polignac number, because 655840505 - 2⁴ = 655840489 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 92609 + ... + 99438.

It is an arithmetic number, because the mean of its divisors is an integer number (98520624).

Almost surely, 2^655840505 is an apocalyptic number.

It is an amenable number.

655840505 is a deficient number, since it is larger than the sum of its proper divisors (132324487).

655840505 is a wasteful number, since it uses less digits than its factorization.

655840505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192735.

The product of its (nonzero) digits is 120000, while the sum is 38.

The square root of 655840505 is about 25609.3831436839. The cubic root of 655840505 is about 868.8258724343.

The spelling of 655840505 in words is "six hundred fifty-five million, eight hundred forty thousand, five hundred five".