27842215771 has 2 divisors, whose sum is σ = 27842215772. Its totient is φ = 27842215770.

The previous prime is 27842215759. The next prime is 27842215799. The reversal of 27842215771 is 17751224872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27842215771 - 2¹⁵ = 27842183003 is a prime.

It is a super-2 number, since 2×27842215771² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27842215741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13921107885 + 13921107886.

It is an arithmetic number, because the mean of its divisors is an integer number (13921107886).

Almost surely, 2^27842215771 is an apocalyptic number.

27842215771 is a deficient number, since it is larger than the sum of its proper divisors (1).

27842215771 is an equidigital number, since it uses as much as digits as its factorization.

27842215771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 46.

The spelling of 27842215771 in words is "twenty-seven billion, eight hundred forty-two million, two hundred fifteen thousand, seven hundred seventy-one".