64581359796 has 36 divisors (see below), whose sum is σ = 163325662500. Its totient is φ = 21516789888.

The previous prime is 64581359737. The next prime is 64581359813. The reversal of 64581359796 is 69795318546.

64581359796 is a `hidden beast` number, since 6 + 458 + 1 + 3 + 5 + 97 + 96 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55587492900 + 8993866896 = 235770^2 + 94836^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 354171 + ... + 504578.

Almost surely, 2^64581359796 is an apocalyptic number.

It is an amenable number.

64581359796 is an abundant number, since it is smaller than the sum of its proper divisors (98744302704).

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

64581359796 is a wasteful number, since it uses less digits than its factorization.

64581359796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860848 (or 860843 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 64581359796 in words is "sixty-four billion, five hundred eighty-one million, three hundred fifty-nine thousand, seven hundred ninety-six".