27081968356 has 27 divisors (see below), whose sum is σ = 47902805769. Its totient is φ = 13396988928.

The previous prime is 27081968341. The next prime is 27081968357. The reversal of 27081968356 is 65386918072.

The square root of 27081968356 is 164566.

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., 10595408356 + 16486560000 = 102934^2 + 128400^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27081968297 and 27081968306.

It is not an unprimeable number, because it can be changed into a prime (27081968357) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35216740 + ... + 35217508.

Almost surely, 2^27081968356 is an apocalyptic number.

27081968356 is the 164566-th square number.

It is an amenable number.

27081968356 is a deficient number, since it is larger than the sum of its proper divisors (20820837413).

27081968356 is an frugal number, since it uses more digits than its factorization.

27081968356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 27081968356 in words is "twenty-seven billion, eighty-one million, nine hundred sixty-eight thousand, three hundred fifty-six".