28642310663 has 4 divisors (see below), whose sum is σ = 29340903648. Its totient is φ = 27943717680.

The previous prime is 28642310647. The next prime is 28642310681. The reversal of 28642310663 is 36601324682.

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

It is a cyclic number.

It is not a de Polignac number, because 28642310663 - 2⁴ = 28642310647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 698592943 = 28642310663 / (2 + 8 + 6 + 4 + 2 + 3 + 1 + 0 + 6 + 6 + 3).

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 28642310663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642310603) 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, 349296431 + ... + 349296512.

It is an arithmetic number, because the mean of its divisors is an integer number (7335225912).

Almost surely, 2^28642310663 is an apocalyptic number.

28642310663 is a deficient number, since it is larger than the sum of its proper divisors (698592985).

28642310663 is an equidigital number, since it uses as much as digits as its factorization.

28642310663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698592984.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 28642310663 in words is "twenty-eight billion, six hundred forty-two million, three hundred ten thousand, six hundred sixty-three".