28527018081866 has 16 divisors (see below), whose sum is σ = 43834398333768. Its totient is φ = 13915555142400.

The previous prime is 28527018081851. The next prime is 28527018081917. The reversal of 28527018081866 is 66818081072582.

It can be written as a sum of positive squares in 4 ways, for example, as 22350475961641 + 6176542120225 = 4727629^2 + 2485265^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28527018081799 and 28527018081808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20903006 + ... + 22225878.

Almost surely, 2^{28527018081866} is an apocalyptic number.

28527018081866 is a deficient number, since it is larger than the sum of its proper divisors (15307380251902).

28527018081866 is a wasteful number, since it uses less digits than its factorization.

28527018081866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585897.

The product of its (nonzero) digits is 20643840, while the sum is 62.

The spelling of 28527018081866 in words is "twenty-eight trillion, five hundred twenty-seven billion, eighteen million, eighty-one thousand, eight hundred sixty-six".