655600561 has 16 divisors (see below), whose sum is σ = 829578240. Its totient is φ = 503228880.

The previous prime is 655600511. The next prime is 655600591. The reversal of 655600561 is 165006556.

It is not a de Polignac number, because 655600561 - 2¹¹ = 655598513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655600511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58381 + ... + 68698.

It is an arithmetic number, because the mean of its divisors is an integer number (51848640).

Almost surely, 2^655600561 is an apocalyptic number.

It is an amenable number.

655600561 is a deficient number, since it is larger than the sum of its proper divisors (173977679).

655600561 is a wasteful number, since it uses less digits than its factorization.

655600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127164.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 655600561 is about 25604.6980259483. The cubic root of 655600561 is about 868.7199040969.

The spelling of 655600561 in words is "six hundred fifty-five million, six hundred thousand, five hundred sixty-one".