27481819291 has 2 divisors, whose sum is σ = 27481819292. Its totient is φ = 27481819290.

The previous prime is 27481819259. The next prime is 27481819297. The reversal of 27481819291 is 19291818472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27481819291 - 2⁵ = 27481819259 is a prime.

It is not a weakly prime, because it can be changed into another prime (27481819297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13740909645 + 13740909646.

It is an arithmetic number, because the mean of its divisors is an integer number (13740909646).

Almost surely, 2^27481819291 is an apocalyptic number.

27481819291 is a deficient number, since it is larger than the sum of its proper divisors (1).

27481819291 is an equidigital number, since it uses as much as digits as its factorization.

27481819291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 52.

The spelling of 27481819291 in words is "twenty-seven billion, four hundred eighty-one million, eight hundred nineteen thousand, two hundred ninety-one".