28133361616 has 10 divisors (see below), whose sum is σ = 54508388162. Its totient is φ = 14066680800.

The previous prime is 28133361611. The next prime is 28133361623. The reversal of 28133361616 is 61616333182.

It can be written as a sum of positive squares in only one way, i.e., 27292361616 + 841000000 = 165204^2 + 29000^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133361611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 879167535 + ... + 879167566.

Almost surely, 2^28133361616 is an apocalyptic number.

It is an amenable number.

28133361616 is a deficient number, since it is larger than the sum of its proper divisors (26375026546).

28133361616 is a wasteful number, since it uses less digits than its factorization.

28133361616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758335109 (or 1758335103 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

Adding to 28133361616 its reverse (61616333182), we get a palindrome (89749694798).

The spelling of 28133361616 in words is "twenty-eight billion, one hundred thirty-three million, three hundred sixty-one thousand, six hundred sixteen".