655516520 has 64 divisors (see below), whose sum is σ = 1511654400. Its totient is φ = 255715840.

The previous prime is 655516513. The next prime is 655516559. The reversal of 655516520 is 25615556.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 809876 + ... + 810684.

It is an arithmetic number, because the mean of its divisors is an integer number (23619600).

Almost surely, 2^655516520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655516520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755827200).

655516520 is an abundant number, since it is smaller than the sum of its proper divisors (856137880).

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

655516520 is a wasteful number, since it uses less digits than its factorization.

655516520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 655516520 is about 25603.0568487437. The cubic root of 655516520 is about 868.6827823017.

The spelling of 655516520 in words is "six hundred fifty-five million, five hundred sixteen thousand, five hundred twenty".