27430976081 has 2 divisors, whose sum is σ = 27430976082. Its totient is φ = 27430976080.

The previous prime is 27430976071. The next prime is 27430976087. The reversal of 27430976081 is 18067903472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16131286081 + 11299690000 = 127009^2 + 106300^2 .

It is a cyclic number.

It is not a de Polignac number, because 27430976081 - 2⁶ = 27430976017 is a prime.

It is a super-2 number, since 2×27430976081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27430976087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13715488040 + 13715488041.

It is an arithmetic number, because the mean of its divisors is an integer number (13715488041).

Almost surely, 2^27430976081 is an apocalyptic number.

It is an amenable number.

27430976081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27430976081 is an equidigital number, since it uses as much as digits as its factorization.

27430976081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 27430976081 in words is "twenty-seven billion, four hundred thirty million, nine hundred seventy-six thousand, eighty-one".