656111565616 has 80 divisors (see below), whose sum is σ = 1443388172800. Its totient is φ = 286418260224.

The previous prime is 656111565611. The next prime is 656111565631. The reversal of 656111565616 is 616565111656.

656111565616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×656111565616³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656111565616.

It is not an unprimeable number, because it can be changed into a prime (656111565611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312185 + ... + 2580391.

It is an arithmetic number, because the mean of its divisors is an integer number (18042352160).

Almost surely, 2^656111565616 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 656111565616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721694086400).

656111565616 is an abundant number, since it is smaller than the sum of its proper divisors (787276607184).

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

656111565616 is a wasteful number, since it uses less digits than its factorization.

656111565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268866 (or 268860 counting only the distinct ones).

The product of its digits is 972000, while the sum is 49.

The spelling of 656111565616 in words is "six hundred fifty-six billion, one hundred eleven million, five hundred sixty-five thousand, six hundred sixteen".