28516969953 has 12 divisors (see below), whose sum is σ = 41404607140. Its totient is φ = 18912807936.

The previous prime is 28516969919. The next prime is 28516969963. The reversal of 28516969953 is 35996961582.

28516969953 is a `hidden beast` number, since 2 + 8 + 516 + 9 + 69 + 9 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5418137664 + 23098832289 = 73608^2 + 151983^2 .

It is not a de Polignac number, because 28516969953 - 2¹² = 28516965857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28516969903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8206948 + ... + 8210421.

Almost surely, 2^28516969953 is an apocalyptic number.

It is an amenable number.

28516969953 is a deficient number, since it is larger than the sum of its proper divisors (12887637187).

28516969953 is a wasteful number, since it uses less digits than its factorization.

28516969953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16417568 (or 16417565 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 63.

The spelling of 28516969953 in words is "twenty-eight billion, five hundred sixteen million, nine hundred sixty-nine thousand, nine hundred fifty-three".