28281467653 has 4 divisors (see below), whose sum is σ = 28365389260. Its totient is φ = 28197546048.

The previous prime is 28281467651. The next prime is 28281467659. The reversal of 28281467653 is 35676418282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17832130369 + 10449337284 = 133537^2 + 102222^2 .

It is a cyclic number.

It is not a de Polignac number, because 28281467653 - 2¹ = 28281467651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28281467653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281467651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41960298 + ... + 41960971.

It is an arithmetic number, because the mean of its divisors is an integer number (7091347315).

Almost surely, 2^28281467653 is an apocalyptic number.

It is an amenable number.

28281467653 is a deficient number, since it is larger than the sum of its proper divisors (83921607).

28281467653 is an equidigital number, since it uses as much as digits as its factorization.

28281467653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83921606.

The product of its digits is 3870720, while the sum is 52.

The spelling of 28281467653 in words is "twenty-eight billion, two hundred eighty-one million, four hundred sixty-seven thousand, six hundred fifty-three".