656441646144656 has 40 divisors (see below), whose sum is σ = 1285606527579000. Its totient is φ = 324678080307200.

The previous prime is 656441646144643. The next prime is 656441646144797.

656441646144656 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 287420619738256 + 369021026406400 = 16953484^2 + 19209920^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181352081 + ... + 184936368.

It is an arithmetic number, because the mean of its divisors is an integer number (32140163189475).

Almost surely, 2^{656441646144656} is an apocalyptic number.

It is an amenable number.

656441646144656 is a deficient number, since it is larger than the sum of its proper divisors (629164881434344).

656441646144656 is a wasteful number, since it uses less digits than its factorization.

656441646144656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366289667 (or 366289661 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 68.

The spelling of 656441646144656 in words is "six hundred fifty-six trillion, four hundred forty-one billion, six hundred forty-six million, one hundred forty-four thousand, six hundred fifty-six".