28546268669 has 4 divisors (see below), whose sum is σ = 28594407996. Its totient is φ = 28498129344.

The previous prime is 28546268651. The next prime is 28546268671. The reversal of 28546268669 is 96686264582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19764704569 + 8781564100 = 140587^2 + 93710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28546268669 is a prime.

It is a super-2 number, since 2×28546268669² (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 (28548268669) 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, 24068774 + ... + 24069959.

It is an arithmetic number, because the mean of its divisors is an integer number (7148601999).

Almost surely, 2^28546268669 is an apocalyptic number.

It is an amenable number.

28546268669 is a deficient number, since it is larger than the sum of its proper divisors (48139327).

28546268669 is an equidigital number, since it uses as much as digits as its factorization.

28546268669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48139326.

The product of its digits is 59719680, while the sum is 62.

The spelling of 28546268669 in words is "twenty-eight billion, five hundred forty-six million, two hundred sixty-eight thousand, six hundred sixty-nine".