655425520 has 80 divisors (see below), whose sum is σ = 1659492000. Its totient is φ = 239791104.

The previous prime is 655425493. The next prime is 655425527. The reversal of 655425520 is 25524556.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×655425520² = 859165224534540800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655425527) 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 15 ways as a sum of consecutive naturals, for example, 36646 + ... + 51514.

It is an arithmetic number, because the mean of its divisors is an integer number (20743650).

Almost surely, 2^655425520 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 655425520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829746000).

655425520 is an abundant number, since it is smaller than the sum of its proper divisors (1004066480).

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

655425520 is a wasteful number, since it uses less digits than its factorization.

655425520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14930 (or 14924 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 655425520 is about 25601.2796555172. The cubic root of 655425520 is about 868.6425830649.

The spelling of 655425520 in words is "six hundred fifty-five million, four hundred twenty-five thousand, five hundred twenty".