28163742051664 has 10 divisors (see below), whose sum is σ = 54567250225130. Its totient is φ = 14081871025824.

The previous prime is 28163742051661. The next prime is 28163742051703. The reversal of 28163742051664 is 46615024736182.

It can be written as a sum of positive squares in only one way, i.e., 28138144611600 + 25597440064 = 5304540^2 + 159992^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163742051661) by changing a digit.

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 as a sum of consecutive naturals, namely, 880116939099 + ... + 880116939130.

It is an arithmetic number, because the mean of its divisors is an integer number (5456725022513).

Almost surely, 2^{28163742051664} is an apocalyptic number.

It is an amenable number.

28163742051664 is a deficient number, since it is larger than the sum of its proper divisors (26403508173466).

28163742051664 is a wasteful number, since it uses less digits than its factorization.

28163742051664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760233878237 (or 1760233878231 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 28163742051664 in words is "twenty-eight trillion, one hundred sixty-three billion, seven hundred forty-two million, fifty-one thousand, six hundred sixty-four".