27476539891 has 2 divisors, whose sum is σ = 27476539892. Its totient is φ = 27476539890.

The previous prime is 27476539877. The next prime is 27476539913. The reversal of 27476539891 is 19893567472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27476539891 - 2⁹ = 27476539379 is a prime.

It is not a weakly prime, because it can be changed into another prime (27476539801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13738269945 + 13738269946.

It is an arithmetic number, because the mean of its divisors is an integer number (13738269946).

Almost surely, 2^27476539891 is an apocalyptic number.

27476539891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27476539891 is an equidigital number, since it uses as much as digits as its factorization.

27476539891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 61.

The spelling of 27476539891 in words is "twenty-seven billion, four hundred seventy-six million, five hundred thirty-nine thousand, eight hundred ninety-one".