27528861568 has 96 divisors (see below), whose sum is σ = 60836227200. Its totient is φ = 12395335680.

The previous prime is 27528861559. The next prime is 27528861571. The reversal of 27528861568 is 86516882572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871393 + ... + 902431.

It is an arithmetic number, because the mean of its divisors is an integer number (633710700).

Almost surely, 2^27528861568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27528861568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30418113600).

27528861568 is an abundant number, since it is smaller than the sum of its proper divisors (33307365632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27528861568 is a wasteful number, since it uses less digits than its factorization.

27528861568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31120 (or 31095 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 58.

The spelling of 27528861568 in words is "twenty-seven billion, five hundred twenty-eight million, eight hundred sixty-one thousand, five hundred sixty-eight".