27312697981281 has 8 divisors (see below), whose sum is σ = 36436647449664. Its totient is φ = 18198606916880.

The previous prime is 27312697981279. The next prime is 27312697981307. The reversal of 27312697981281 is 18218979621372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27312697981281 - 2¹ = 27312697981279 is a prime.

It is a super-2 number, since 2×27312697981281² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27312697981211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2464594530 + ... + 2464605611.

It is an arithmetic number, because the mean of its divisors is an integer number (4554580931208).

Almost surely, 2^{27312697981281} is an apocalyptic number.

It is an amenable number.

27312697981281 is a deficient number, since it is larger than the sum of its proper divisors (9123949468383).

27312697981281 is a wasteful number, since it uses less digits than its factorization.

27312697981281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929201991.

The product of its digits is 36578304, while the sum is 66.

The spelling of 27312697981281 in words is "twenty-seven trillion, three hundred twelve billion, six hundred ninety-seven million, nine hundred eighty-one thousand, two hundred eighty-one".