65655655656 has 128 divisors (see below), whose sum is σ = 178522828800. Its totient is φ = 20045283840.

The previous prime is 65655655643. The next prime is 65655655679.

65655655656 is nontrivially palindromic in base 10.

65655655656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65655655656.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23421951 + ... + 23424753.

It is an arithmetic number, because the mean of its divisors is an integer number (1394709600).

Almost surely, 2^65655655656 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 65655655656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89261414400).

65655655656 is an abundant number, since it is smaller than the sum of its proper divisors (112867173144).

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

65655655656 is a wasteful number, since it uses less digits than its factorization.

65655655656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519 (or 4515 counting only the distinct ones).

The product of its digits is 121500000, while the sum is 60.

The spelling of 65655655656 in words is "sixty-five billion, six hundred fifty-five million, six hundred fifty-five thousand, six hundred fifty-six".