65635988953656 has 64 divisors (see below), whose sum is σ = 179010148878720. Its totient is φ = 19889370702720.

The previous prime is 65635988953631. The next prime is 65635988953663.

65635988953656 is nontrivially palindromic in base 10.

65635988953656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14529666 + ... + 18503598.

It is an arithmetic number, because the mean of its divisors is an integer number (2797033576230).

Almost surely, 2^{65635988953656} is an apocalyptic number.

65635988953656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65635988953656 is an abundant number, since it is smaller than the sum of its proper divisors (113374159925064).

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

65635988953656 is a wasteful number, since it uses less digits than its factorization.

65635988953656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036516 (or 4036512 counting only the distinct ones).

The product of its digits is 37791360000, while the sum is 84.

The spelling of 65635988953656 in words is "sixty-five trillion, six hundred thirty-five billion, nine hundred eighty-eight million, nine hundred fifty-three thousand, six hundred fifty-six".