28806566953 has 2 divisors, whose sum is σ = 28806566954. Its totient is φ = 28806566952.

The previous prime is 28806566951. The next prime is 28806566993. The reversal of 28806566953 is 35966560882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25949343744 + 2857223209 = 161088^2 + 53453^2 .

It is a cyclic number.

It is not a de Polignac number, because 28806566953 - 2¹ = 28806566951 is a prime.

Together with 28806566951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28806566951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403283476 + 14403283477.

It is an arithmetic number, because the mean of its divisors is an integer number (14403283477).

Almost surely, 2^28806566953 is an apocalyptic number.

It is an amenable number.

28806566953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28806566953 is an equidigital number, since it uses as much as digits as its factorization.

28806566953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 28806566953 in words is "twenty-eight billion, eight hundred six million, five hundred sixty-six thousand, nine hundred fifty-three".