656448468480 has 1800 divisors, whose sum is σ = 2908839103632. Its totient is φ = 140813697024.

The previous prime is 656448468469. The next prime is 656448468491. The reversal of 656448468480 is 84864844656.

656448468480 is a `hidden beast` number, since 6 + 56 + 4 + 48 + 4 + 68 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (656448468469) and next prime (656448468491).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 12385820134 + ... + 12385820186.

Almost surely, 2^656448468480 is an apocalyptic number.

656448468480 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 656448468480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1454419551816).

656448468480 is an abundant number, since it is smaller than the sum of its proper divisors (2252390635152).

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

656448468480 is an equidigital number, since it uses as much as digits as its factorization.

656448468480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 141557760, while the sum is 63.

The spelling of 656448468480 in words is "six hundred fifty-six billion, four hundred forty-eight million, four hundred sixty-eight thousand, four hundred eighty".