27747563776 has 81 divisors (see below), whose sum is σ = 57522713521. Its totient is φ = 13358062592.

The previous prime is 27747563743. The next prime is 27747563797. The reversal of 27747563776 is 67736574772.

The square root of 27747563776 is 166576.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14550149376 + 13197414400 = 120624^2 + 114880^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 77291085 + ... + 77291443.

Almost surely, 2^27747563776 is an apocalyptic number.

27747563776 is the 166576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27747563776

27747563776 is an abundant number, since it is smaller than the sum of its proper divisors (29775149745).

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

27747563776 is an frugal number, since it uses more digits than its factorization.

27747563776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 390 counting only the distinct ones).

The product of its digits is 72606240, while the sum is 61.

The spelling of 27747563776 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred sixty-three thousand, seven hundred seventy-six".