27436940881 has 9 divisors (see below), whose sum is σ = 31917790281. Its totient is φ = 23516384052.

The previous prime is 27436940873. The next prime is 27436940893. The reversal of 27436940881 is 18804963472.

The square root of 27436940881 is 165641.

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

It is not a de Polignac number, because 27436940881 - 2³ = 27436940873 is a prime.

It is a super-2 number, since 2×27436940881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27436940801) 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, 1147656 + ... + 1171318.

Almost surely, 2^27436940881 is an apocalyptic number.

27436940881 is the 165641-st square number.

27436940881 is the 82821-st centered octagonal number.

It is an amenable number.

27436940881 is a deficient number, since it is larger than the sum of its proper divisors (4480849400).

27436940881 is an frugal number, since it uses more digits than its factorization.

27436940881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47340 (or 23670 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 27436940881 in words is "twenty-seven billion, four hundred thirty-six million, nine hundred forty thousand, eight hundred eighty-one".