28668146653 has 4 divisors (see below), whose sum is σ = 28668608320. Its totient is φ = 28667684988.

The previous prime is 28668146629. The next prime is 28668146659. The reversal of 28668146653 is 35664186682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35664186682 = 2 ⋅17832093341.

It is a cyclic number.

It is not a de Polignac number, because 28668146653 - 2²¹ = 28666049501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28668146594 and 28668146603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668146659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119925 + ... + 267802.

It is an arithmetic number, because the mean of its divisors is an integer number (7167152080).

Almost surely, 2^28668146653 is an apocalyptic number.

It is an amenable number.

28668146653 is a deficient number, since it is larger than the sum of its proper divisors (461667).

28668146653 is an equidigital number, since it uses as much as digits as its factorization.

28668146653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461666.

The product of its digits is 9953280, while the sum is 55.

The spelling of 28668146653 in words is "twenty-eight billion, six hundred sixty-eight million, one hundred forty-six thousand, six hundred fifty-three".