655506520 has 32 divisors (see below), whose sum is σ = 1499893200. Its totient is φ = 257757568.

The previous prime is 655506499. The next prime is 655506521. The reversal of 655506520 is 25605556.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655506521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136519 + ... + 141238.

Almost surely, 2^655506520 is an apocalyptic number.

It is an amenable number.

655506520 is an abundant number, since it is smaller than the sum of its proper divisors (844386680).

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

655506520 is a wasteful number, since it uses less digits than its factorization.

655506520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277827 (or 277823 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 655506520 is about 25602.8615588180. The cubic root of 655506520 is about 868.6783649851.

The spelling of 655506520 in words is "six hundred fifty-five million, five hundred six thousand, five hundred twenty".