655255980 has 120 divisors (see below), whose sum is σ = 2086587888. Its totient is φ = 172098432.

The previous prime is 655255963. The next prime is 655255981. The reversal of 655255980 is 89552556.

655255980 is a `hidden beast` number, since 6 + 5 + 52 + 5 + 598 + 0 = 666.

655255980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (655255981) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 105522 + ... + 111558.

Almost surely, 2^655255980 is an apocalyptic number.

655255980 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 655255980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043293944).

655255980 is an abundant number, since it is smaller than the sum of its proper divisors (1431331908).

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

655255980 is a wasteful number, since it uses less digits than its factorization.

655255980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6114 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The square root of 655255980 is about 25597.9682787521. The cubic root of 655255980 is about 868.5676788696.

The spelling of 655255980 in words is "six hundred fifty-five million, two hundred fifty-five thousand, nine hundred eighty".