28064165252644 has 6 divisors (see below), whose sum is σ = 49112289192134. Its totient is φ = 14032082626320.

The previous prime is 28064165252587. The next prime is 28064165252647. The reversal of 28064165252644 is 44625256146082.

It can be written as a sum of positive squares in only one way, i.e., 28051450435044 + 12714817600 = 5296362^2 + 112760^2 .

It is not an unprimeable number, because it can be changed into a prime (28064165252647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3508020656577 + ... + 3508020656584.

Almost surely, 2^{28064165252644} is an apocalyptic number.

It is an amenable number.

28064165252644 is a deficient number, since it is larger than the sum of its proper divisors (21048123939490).

28064165252644 is a wasteful number, since it uses less digits than its factorization.

28064165252644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016041313165 (or 7016041313163 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 55.

The spelling of 28064165252644 in words is "twenty-eight trillion, sixty-four billion, one hundred sixty-five million, two hundred fifty-two thousand, six hundred forty-four".