656877568896 has 448 divisors, whose sum is σ = 2048755924800. Its totient is φ = 209481707520.

The previous prime is 656877568883. The next prime is 656877568909. The reversal of 656877568896 is 698865778656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (656877568883) and next prime (656877568909).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 210603625 + ... + 210606743.

Almost surely, 2^656877568896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656877568896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024377962400).

656877568896 is an abundant number, since it is smaller than the sum of its proper divisors (1391878355904).

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

656877568896 is an equidigital number, since it uses as much as digits as its factorization.

656877568896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249 (or 3222 counting only the distinct ones).

The product of its digits is 7315660800, while the sum is 81.

The spelling of 656877568896 in words is "six hundred fifty-six billion, eight hundred seventy-seven million, five hundred sixty-eight thousand, eight hundred ninety-six".