655570656 has 216 divisors, whose sum is σ = 2105111736. Its totient is φ = 192360960.

The previous prime is 655570649. The next prime is 655570681. The reversal of 655570656 is 656075556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1980411 + ... + 1980741.

Almost surely, 2^655570656 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 655570656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052555868).

655570656 is an abundant number, since it is smaller than the sum of its proper divisors (1449541080).

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

655570656 is a wasteful number, since it uses less digits than its factorization.

655570656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The square root of 655570656 is about 25604.1140444265. The cubic root of 655570656 is about 868.7066951069.

Adding to 655570656 its product of nonzero digits (945000), we get a palindrome (656515656).

The spelling of 655570656 in words is "six hundred fifty-five million, five hundred seventy thousand, six hundred fifty-six".