28363875282661 has 4 divisors (see below), whose sum is σ = 28365818960332. Its totient is φ = 28361931604992.

The previous prime is 28363875282637. The next prime is 28363875282679. The reversal of 28363875282661 is 16628257836382.

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 16939035878436 + 11424839404225 = 4115706^2 + 3380065^2 .

It is a cyclic number.

It is not a de Polignac number, because 28363875282661 - 2¹¹ = 28363875280613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28363875202661) 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, 971816946 + ... + 971846131.

It is an arithmetic number, because the mean of its divisors is an integer number (7091454740083).

Almost surely, 2^{28363875282661} is an apocalyptic number.

It is an amenable number.

28363875282661 is a deficient number, since it is larger than the sum of its proper divisors (1943677671).

28363875282661 is a wasteful number, since it uses less digits than its factorization.

28363875282661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943677670.

The product of its digits is 278691840, while the sum is 67.

The spelling of 28363875282661 in words is "twenty-eight trillion, three hundred sixty-three billion, eight hundred seventy-five million, two hundred eighty-two thousand, six hundred sixty-one".