656803343308656 has 40 divisors (see below), whose sum is σ = 1697824766815744. Its totient is φ = 218794732079040.

The previous prime is 656803343308573. The next prime is 656803343308657.

656803343308656 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656803343308657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4366039330 + ... + 4366189761.

Almost surely, 2^{656803343308656} is an apocalyptic number.

It is an amenable number.

656803343308656 is an abundant number, since it is smaller than the sum of its proper divisors (1041021423507088).

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

656803343308656 is a wasteful number, since it uses less digits than its factorization.

656803343308656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732230669 (or 8732230663 counting only the distinct ones).

The product of its (nonzero) digits is 671846400, while the sum is 66.

The spelling of 656803343308656 in words is "six hundred fifty-six trillion, eight hundred three billion, three hundred forty-three million, three hundred eight thousand, six hundred fifty-six".