655998488208 has 220 divisors, whose sum is σ = 2178861787968. Its totient is φ = 187426249920.

The previous prime is 655998488203. The next prime is 655998488213. The reversal of 655998488208 is 802884899556.

655998488208 is a `hidden beast` number, since 6 + 5 + 59 + 98 + 488 + 2 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (655998488203) and next prime (655998488213).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (655998488203) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 6563893 + ... + 6663083.

Almost surely, 2^655998488208 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 655998488208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089430893984).

655998488208 is an abundant number, since it is smaller than the sum of its proper divisors (1522863299760).

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

655998488208 is an frugal number, since it uses more digits than its factorization.

655998488208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99236 (or 99203 counting only the distinct ones).

The product of its (nonzero) digits is 398131200, while the sum is 72.

The spelling of 655998488208 in words is "six hundred fifty-five billion, nine hundred ninety-eight million, four hundred eighty-eight thousand, two hundred eight".