655557056 has 112 divisors (see below), whose sum is σ = 1635386112. Its totient is φ = 253286400.

The previous prime is 655557047. The next prime is 655557113. The reversal of 655557056 is 650755556.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 655556998 and 655557016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674651 + ... + 675621.

Almost surely, 2^655557056 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 655557056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817693056).

655557056 is an abundant number, since it is smaller than the sum of its proper divisors (979829056).

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

655557056 is a wasteful number, since it uses less digits than its factorization.

655557056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 44.

The square root of 655557056 is about 25603.8484607295. The cubic root of 655557056 is about 868.7006878761.

The spelling of 655557056 in words is "six hundred fifty-five million, five hundred fifty-seven thousand, fifty-six".