655963326794880 has 1920 divisors, whose sum is σ = 2556764523720000. Its totient is φ = 160191711313920.

The previous prime is 655963326794863. The next prime is 655963326794917. The reversal of 655963326794880 is 88497623369556.

655963326794880 is a `hidden beast` number, since 6 + 5 + 5 + 9 + 63 + 3 + 2 + 6 + 79 + 488 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 655963326794880.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 992380221750 + ... + 992380222410.

Almost surely, 2^{655963326794880} is an apocalyptic number.

655963326794880 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 655963326794880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278382261860000).

655963326794880 is an abundant number, since it is smaller than the sum of its proper divisors (1900801196925120).

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

655963326794880 is a wasteful number, since it uses less digits than its factorization.

655963326794880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 14108774400, while the sum is 81.

The spelling of 655963326794880 in words is "six hundred fifty-five trillion, nine hundred sixty-three billion, three hundred twenty-six million, seven hundred ninety-four thousand, eight hundred eighty".