655562880 has 384 divisors, whose sum is σ = 2635027200. Its totient is φ = 147087360.

The previous prime is 655562861. The next prime is 655562903. The reversal of 655562880 is 88265556.

655562880 is a `hidden beast` number, since 6 + 5 + 5 + 562 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is a congruent number.

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, 2862606 + ... + 2862834.

It is an arithmetic number, because the mean of its divisors is an integer number (6862050).

Almost surely, 2^655562880 is an apocalyptic number.

655562880 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 655562880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317513600).

655562880 is an abundant number, since it is smaller than the sum of its proper divisors (1979464320).

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

655562880 is a wasteful number, since it uses less digits than its factorization.

655562880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 655562880 is about 25603.9621933794. The cubic root of 655562880 is about 868.7032603945.

The spelling of 655562880 in words is "six hundred fifty-five million, five hundred sixty-two thousand, eight hundred eighty".