28563073856638 has 16 divisors (see below), whose sum is σ = 42938889794496. Its totient is φ = 14250113095680.

The previous prime is 28563073856567. The next prime is 28563073856651. The reversal of 28563073856638 is 83665837036582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22678518 + ... + 23904838.

It is an arithmetic number, because the mean of its divisors is an integer number (2683680612156).

Almost surely, 2^{28563073856638} is an apocalyptic number.

28563073856638 is a deficient number, since it is larger than the sum of its proper divisors (14375815937858).

28563073856638 is a wasteful number, since it uses less digits than its factorization.

28563073856638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251939.

The product of its (nonzero) digits is 1045094400, while the sum is 70.

The spelling of 28563073856638 in words is "twenty-eight trillion, five hundred sixty-three billion, seventy-three million, eight hundred fifty-six thousand, six hundred thirty-eight".