28565812453 has 8 divisors (see below), whose sum is σ = 30983866200. Its totient is φ = 26229726720.

The previous prime is 28565812433. The next prime is 28565812459. The reversal of 28565812453 is 35421856582.

It can be written as a sum of positive squares in 4 ways, for example, as 349203969 + 28216608484 = 18687^2 + 167978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28565812453 - 2⁹ = 28565811941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28565812397 and 28565812406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28565812459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20491278 + ... + 20492671.

It is an arithmetic number, because the mean of its divisors is an integer number (3872983275).

Almost surely, 2^28565812453 is an apocalyptic number.

It is an amenable number.

28565812453 is a deficient number, since it is larger than the sum of its proper divisors (2418053747).

28565812453 is a wasteful number, since it uses less digits than its factorization.

28565812453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40984007.

The product of its digits is 2304000, while the sum is 49.

The spelling of 28565812453 in words is "twenty-eight billion, five hundred sixty-five million, eight hundred twelve thousand, four hundred fifty-three".