655522560 has 432 divisors, whose sum is σ = 2831512320. Its totient is φ = 136028160.

The previous prime is 655522547. The next prime is 655522561. The reversal of 655522560 is 65225556.

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

It is not an unprimeable number, because it can be changed into a prime (655522561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 886671 + ... + 887409.

Almost surely, 2^655522560 is an apocalyptic number.

655522560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655522560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415756160).

655522560 is an abundant number, since it is smaller than the sum of its proper divisors (2175989760).

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

655522560 is a wasteful number, since it uses less digits than its factorization.

655522560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 655522560 is about 25603.1748031372. The cubic root of 655522560 is about 868.6854503391.

The spelling of 655522560 in words is "six hundred fifty-five million, five hundred twenty-two thousand, five hundred sixty".