27971395411 has 2 divisors, whose sum is σ = 27971395412. Its totient is φ = 27971395410.

The previous prime is 27971395393. The next prime is 27971395447. The reversal of 27971395411 is 11459317972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27971395411 - 2¹⁷ = 27971264339 is a prime.

It is a super-2 number, since 2×27971395411² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27971395481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13985697705 + 13985697706.

It is an arithmetic number, because the mean of its divisors is an integer number (13985697706).

Almost surely, 2^27971395411 is an apocalyptic number.

27971395411 is a deficient number, since it is larger than the sum of its proper divisors (1).

27971395411 is an equidigital number, since it uses as much as digits as its factorization.

27971395411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The spelling of 27971395411 in words is "twenty-seven billion, nine hundred seventy-one million, three hundred ninety-five thousand, four hundred eleven".