655319880 has 192 divisors, whose sum is σ = 2260440000. Its totient is φ = 164187648.

The previous prime is 655319879. The next prime is 655319897. The reversal of 655319880 is 88913556.

655319880 is a `hidden beast` number, since 6 + 553 + 1 + 98 + 8 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1018839 + ... + 1019481.

It is an arithmetic number, because the mean of its divisors is an integer number (11773125).

Almost surely, 2^655319880 is an apocalyptic number.

655319880 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 655319880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130220000).

655319880 is an abundant number, since it is smaller than the sum of its proper divisors (1605120120).

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

655319880 is a wasteful number, since it uses less digits than its factorization.

655319880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 655319880 is about 25599.2163942571. The cubic root of 655319880 is about 868.5959119430.

The spelling of 655319880 in words is "six hundred fifty-five million, three hundred nineteen thousand, eight hundred eighty".