28753586465 has 4 divisors (see below), whose sum is σ = 34504303764. Its totient is φ = 23002869168.

The previous prime is 28753586453. The next prime is 28753586479. The reversal of 28753586465 is 56468535782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56468535782 = 2 ⋅28234267891.

It can be written as a sum of positive squares in 2 ways, for example, as 10437482896 + 18316103569 = 102164^2 + 135337^2 .

It is a cyclic number.

It is not a de Polignac number, because 28753586465 - 2²⁴ = 28736809249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875358642 + ... + 2875358651.

It is an arithmetic number, because the mean of its divisors is an integer number (8626075941).

Almost surely, 2^28753586465 is an apocalyptic number.

It is an amenable number.

28753586465 is a deficient number, since it is larger than the sum of its proper divisors (5750717299).

28753586465 is an equidigital number, since it uses as much as digits as its factorization.

28753586465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5750717298.

The product of its digits is 48384000, while the sum is 59.

The spelling of 28753586465 in words is "twenty-eight billion, seven hundred fifty-three million, five hundred eighty-six thousand, four hundred sixty-five".