28003662649585 has 128 divisors (see below), whose sum is σ = 42652735792128. Its totient is φ = 17221013913600.

The previous prime is 28003662649579. The next prime is 28003662649603. The reversal of 28003662649585 is 58594626630082.

It is not a de Polignac number, because 28003662649585 - 2¹³ = 28003662641393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1763335845 + ... + 1763351725.

It is an arithmetic number, because the mean of its divisors is an integer number (333224498376).

Almost surely, 2^{28003662649585} is an apocalyptic number.

It is an amenable number.

28003662649585 is a deficient number, since it is larger than the sum of its proper divisors (14649073142543).

28003662649585 is an equidigital number, since it uses as much as digits as its factorization.

28003662649585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16076 (or 15994 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 64.

It can be divided in two parts, 2800366 and 2649585, that added together give a triangular number (5449951 = T₃₃₀₁).

The spelling of 28003662649585 in words is "twenty-eight trillion, three billion, six hundred sixty-two million, six hundred forty-nine thousand, five hundred eighty-five".