27665282731 has 2 divisors, whose sum is σ = 27665282732. Its totient is φ = 27665282730.

The previous prime is 27665282693. The next prime is 27665282737. The reversal of 27665282731 is 13728256672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27665282731 - 2¹⁷ = 27665151659 is a prime.

It is a super-2 number, since 2×27665282731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27665282737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13832641365 + 13832641366.

It is an arithmetic number, because the mean of its divisors is an integer number (13832641366).

Almost surely, 2^27665282731 is an apocalyptic number.

27665282731 is a deficient number, since it is larger than the sum of its proper divisors (1).

27665282731 is an equidigital number, since it uses as much as digits as its factorization.

27665282731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 49.

The spelling of 27665282731 in words is "twenty-seven billion, six hundred sixty-five million, two hundred eighty-two thousand, seven hundred thirty-one".