28615902018817 has 2 divisors, whose sum is σ = 28615902018818. Its totient is φ = 28615902018816.

The previous prime is 28615902018763. The next prime is 28615902018917. The reversal of 28615902018817 is 71881020951682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20444513876721 + 8171388142096 = 4521561^2 + 2858564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28615902018817 is a prime.

It is not a weakly prime, because it can be changed into another prime (28615902018917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14307951009408 + 14307951009409.

It is an arithmetic number, because the mean of its divisors is an integer number (14307951009409).

Almost surely, 2^{28615902018817} is an apocalyptic number.

It is an amenable number.

28615902018817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28615902018817 is an equidigital number, since it uses as much as digits as its factorization.

28615902018817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 28615902018817 in words is "twenty-eight trillion, six hundred fifteen billion, nine hundred two million, eighteen thousand, eight hundred seventeen".