655573530 has 128 divisors (see below), whose sum is σ = 1706987520. Its totient is φ = 160634880.

The previous prime is 655573489. The next prime is 655573547. The reversal of 655573530 is 35375556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3925507 + ... + 3925673.

It is an arithmetic number, because the mean of its divisors is an integer number (13335840).

Almost surely, 2^655573530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655573530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853493760).

655573530 is an abundant number, since it is smaller than the sum of its proper divisors (1051413990).

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

655573530 is a wasteful number, since it uses less digits than its factorization.

655573530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 236250, while the sum is 39.

The square root of 655573530 is about 25604.1701681582. The cubic root of 655573530 is about 868.7079645655.

The spelling of 655573530 in words is "six hundred fifty-five million, five hundred seventy-three thousand, five hundred thirty".