28663456069 has 16 divisors (see below), whose sum is σ = 30609057600. Its totient is φ = 26764141824.

The previous prime is 28663455983. The next prime is 28663456091. The reversal of 28663456069 is 96065436682.

It is a cyclic number.

It is not a de Polignac number, because 28663456069 - 2¹¹ = 28663454021 is a prime.

It is a super-2 number, since 2×28663456069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28663456099) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 364717 + ... + 436285.

It is an arithmetic number, because the mean of its divisors is an integer number (1913066100).

Almost surely, 2^28663456069 is an apocalyptic number.

It is an amenable number.

28663456069 is a deficient number, since it is larger than the sum of its proper divisors (1945601531).

28663456069 is a wasteful number, since it uses less digits than its factorization.

28663456069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71892.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 28663456069 in words is "twenty-eight billion, six hundred sixty-three million, four hundred fifty-six thousand, sixty-nine".