64031857721288 has 36 divisors (see below), whose sum is σ = 123393903510465. Its totient is φ = 31150226091168.

The previous prime is 64031857721243. The next prime is 64031857721317. The reversal of 64031857721288 is 88212775813046.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 51660472500484 + 12371385220804 = 7187522^2 + 3517298^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5658262.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64031857721288.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 837384545 + ... + 837461007.

Almost surely, 2^{64031857721288} is an apocalyptic number.

It is an amenable number.

64031857721288 is a deficient number, since it is larger than the sum of its proper divisors (59362045789177).

64031857721288 is an frugal number, since it uses more digits than its factorization.

64031857721288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153006 (or 76502 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 62.

The spelling of 64031857721288 in words is "sixty-four trillion, thirty-one billion, eight hundred fifty-seven million, seven hundred twenty-one thousand, two hundred eighty-eight".