656471208960 has 1408 divisors, whose sum is σ = 2794400640000. Its totient is φ = 142987493376.

The previous prime is 656471208947. The next prime is 656471208977. The reversal of 656471208960 is 69802174656.

656471208960 is a `hidden beast` number, since 6 + 564 + 7 + 12 + 0 + 8 + 9 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 656471208897 and 656471208906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4181345202 + ... + 4181345358.

Almost surely, 2^656471208960 is an apocalyptic number.

656471208960 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 656471208960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397200320000).

656471208960 is an abundant number, since it is smaller than the sum of its proper divisors (2137929431040).

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

656471208960 is a wasteful number, since it uses less digits than its factorization.

656471208960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 656471208960 in words is "six hundred fifty-six billion, four hundred seventy-one million, two hundred eight thousand, nine hundred sixty".