28078812253 has 2 divisors, whose sum is σ = 28078812254. Its totient is φ = 28078812252.

The previous prime is 28078812221. The next prime is 28078812337. The reversal of 28078812253 is 35221887082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18354288484 + 9724523769 = 135478^2 + 98613^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078812253 - 2⁵ = 28078812221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078815253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039406126 + 14039406127.

It is an arithmetic number, because the mean of its divisors is an integer number (14039406127).

Almost surely, 2^28078812253 is an apocalyptic number.

It is an amenable number.

28078812253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078812253 is an equidigital number, since it uses as much as digits as its factorization.

28078812253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 28078812253 in words is "twenty-eight billion, seventy-eight million, eight hundred twelve thousand, two hundred fifty-three".