27400856543 has 2 divisors, whose sum is σ = 27400856544. Its totient is φ = 27400856542.

The previous prime is 27400856477. The next prime is 27400856573. The reversal of 27400856543 is 34565800472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27400856543 - 2¹⁶ = 27400791007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27400856494 and 27400856503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27400856573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13700428271 + 13700428272.

It is an arithmetic number, because the mean of its divisors is an integer number (13700428272).

Almost surely, 2^27400856543 is an apocalyptic number.

27400856543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27400856543 is an equidigital number, since it uses as much as digits as its factorization.

27400856543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 27400856543 in words is "twenty-seven billion, four hundred million, eight hundred fifty-six thousand, five hundred forty-three".