655513056 has 72 divisors (see below), whose sum is σ = 2033590104. Its totient is φ = 198639360.

The previous prime is 655513037. The next prime is 655513093. The reversal of 655513056 is 650315556.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 655513056.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 100291 + ... + 106626.

It is an arithmetic number, because the mean of its divisors is an integer number (28244307).

Almost surely, 2^655513056 is an apocalyptic number.

655513056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

655513056 is an abundant number, since it is smaller than the sum of its proper divisors (1378077048).

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

655513056 is a wasteful number, since it uses less digits than its factorization.

655513056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206944 (or 206933 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 655513056 is about 25602.9892004820. The cubic root of 655513056 is about 868.6812521483.

The spelling of 655513056 in words is "six hundred fifty-five million, five hundred thirteen thousand, fifty-six".