28864064461 has 4 divisors (see below), whose sum is σ = 28864495072. Its totient is φ = 28863633852.

The previous prime is 28864064447. The next prime is 28864064507. The reversal of 28864064461 is 16446046882.

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: 16446046882 = 2 ⋅8223023441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28864064461 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 (28864064161) 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, 90735 + ... + 256828.

It is an arithmetic number, because the mean of its divisors is an integer number (7216123768).

Almost surely, 2^28864064461 is an apocalyptic number.

It is an amenable number.

28864064461 is a deficient number, since it is larger than the sum of its proper divisors (430611).

28864064461 is an equidigital number, since it uses as much as digits as its factorization.

28864064461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430610.

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 28864064461 in words is "twenty-eight billion, eight hundred sixty-four million, sixty-four thousand, four hundred sixty-one".