28178887853 has 2 divisors, whose sum is σ = 28178887854. Its totient is φ = 28178887852.

The previous prime is 28178887819. The next prime is 28178887883. The reversal of 28178887853 is 35878887182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19422045769 + 8756842084 = 139363^2 + 93578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28178887853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28178887853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28178887883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14089443926 + 14089443927.

It is an arithmetic number, because the mean of its divisors is an integer number (14089443927).

Almost surely, 2^28178887853 is an apocalyptic number.

It is an amenable number.

28178887853 is a deficient number, since it is larger than the sum of its proper divisors (1).

28178887853 is an equidigital number, since it uses as much as digits as its factorization.

28178887853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48168960, while the sum is 65.

The spelling of 28178887853 in words is "twenty-eight billion, one hundred seventy-eight million, eight hundred eighty-seven thousand, eight hundred fifty-three".