655055505 has 80 divisors (see below), whose sum is σ = 1280664000. Its totient is φ = 318390912.

The previous prime is 655055503. The next prime is 655055519. The reversal of 655055505 is 505550556.

655055505 is a `hidden beast` number, since 6 + 550 + 55 + 50 + 5 = 666.

It is not a de Polignac number, because 655055505 - 2¹ = 655055503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655055505.

It is not an unprimeable number, because it can be changed into a prime (655055503) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 436246 + ... + 437744.

It is an arithmetic number, because the mean of its divisors is an integer number (16008300).

Almost surely, 2^655055505 is an apocalyptic number.

655055505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

655055505 is a deficient number, since it is larger than the sum of its proper divisors (625608495).

655055505 is a wasteful number, since it uses less digits than its factorization.

655055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The square root of 655055505 is about 25594.0521410737. The cubic root of 655055505 is about 868.4790906579.

The spelling of 655055505 in words is "six hundred fifty-five million, fifty-five thousand, five hundred five".