28518770849 has 2 divisors, whose sum is σ = 28518770850. Its totient is φ = 28518770848.

The previous prime is 28518770783. The next prime is 28518770887. The reversal of 28518770849 is 94807781582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21168795025 + 7349975824 = 145495^2 + 85732^2 .

It is a cyclic number.

It is not a de Polignac number, because 28518770849 - 2⁸ = 28518770593 is a prime.

It is not a weakly prime, because it can be changed into another prime (28518776849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14259385424 + 14259385425.

It is an arithmetic number, because the mean of its divisors is an integer number (14259385425).

Almost surely, 2^28518770849 is an apocalyptic number.

It is an amenable number.

28518770849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28518770849 is an equidigital number, since it uses as much as digits as its factorization.

28518770849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 59.

The spelling of 28518770849 in words is "twenty-eight billion, five hundred eighteen million, seven hundred seventy thousand, eight hundred forty-nine".