28081802579 has 2 divisors, whose sum is σ = 28081802580. Its totient is φ = 28081802578.

The previous prime is 28081802513. The next prime is 28081802621. The reversal of 28081802579 is 97520818082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28081802579 is a prime.

It is not a weakly prime, because it can be changed into another prime (28081802509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040901289 + 14040901290.

It is an arithmetic number, because the mean of its divisors is an integer number (14040901290).

Almost surely, 2^28081802579 is an apocalyptic number.

28081802579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081802579 is an equidigital number, since it uses as much as digits as its factorization.

28081802579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 28081802579 in words is "twenty-eight billion, eighty-one million, eight hundred two thousand, five hundred seventy-nine".