65649694656 has 112 divisors (see below), whose sum is σ = 213782395904. Its totient is φ = 17314200576.

The previous prime is 65649694633. The next prime is 65649694667.

65649694656 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1861240 + ... + 1896183.

It is an arithmetic number, because the mean of its divisors is an integer number (1908771392).

Almost surely, 2^65649694656 is an apocalyptic number.

It is an amenable number.

65649694656 is an abundant number, since it is smaller than the sum of its proper divisors (148132701248).

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

65649694656 is a wasteful number, since it uses less digits than its factorization.

65649694656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757458 (or 3757448 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 66.

The spelling of 65649694656 in words is "sixty-five billion, six hundred forty-nine million, six hundred ninety-four thousand, six hundred fifty-six".