27312697981287 has 6 divisors (see below), whose sum is σ = 39451674861872. Its totient is φ = 18208465320852.

The previous prime is 27312697981279. The next prime is 27312697981307. The reversal of 27312697981287 is 78218979621372.

It is a happy number.

27312697981287 is a `hidden beast` number, since 2 + 7 + 3 + 1 + 269 + 7 + 9 + 81 + 287 = 666.

It is not a de Polignac number, because 27312697981287 - 2³ = 27312697981279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27312697981237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1517372110063 + ... + 1517372110080.

Almost surely, 2^{27312697981287} is an apocalyptic number.

27312697981287 is a deficient number, since it is larger than the sum of its proper divisors (12138976880585).

27312697981287 is a wasteful number, since it uses less digits than its factorization.

27312697981287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034744220149 (or 3034744220146 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 72.

The spelling of 27312697981287 in words is "twenty-seven trillion, three hundred twelve billion, six hundred ninety-seven million, nine hundred eighty-one thousand, two hundred eighty-seven".