27384961543 has 2 divisors, whose sum is σ = 27384961544. Its totient is φ = 27384961542.

The previous prime is 27384961489. The next prime is 27384961559. The reversal of 27384961543 is 34516948372.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27384961543 - 2²⁹ = 26848090631 is a prime.

It is a super-2 number, since 2×27384961543² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27384961943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13692480771 + 13692480772.

It is an arithmetic number, because the mean of its divisors is an integer number (13692480772).

Almost surely, 2^27384961543 is an apocalyptic number.

27384961543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27384961543 is an equidigital number, since it uses as much as digits as its factorization.

27384961543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 52.

The spelling of 27384961543 in words is "twenty-seven billion, three hundred eighty-four million, nine hundred sixty-one thousand, five hundred forty-three".