27456754789 has 2 divisors, whose sum is σ = 27456754790. Its totient is φ = 27456754788.

The previous prime is 27456754769. The next prime is 27456754799. The reversal of 27456754789 is 98745765472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20524860225 + 6931894564 = 143265^2 + 83258^2 .

It is a cyclic number.

It is not a de Polignac number, because 27456754789 - 2¹⁷ = 27456623717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27456754789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27456754709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13728377394 + 13728377395.

It is an arithmetic number, because the mean of its divisors is an integer number (13728377395).

Almost surely, 2^27456754789 is an apocalyptic number.

It is an amenable number.

27456754789 is a deficient number, since it is larger than the sum of its proper divisors (1).

27456754789 is an equidigital number, since it uses as much as digits as its factorization.

27456754789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118540800, while the sum is 64.

The spelling of 27456754789 in words is "twenty-seven billion, four hundred fifty-six million, seven hundred fifty-four thousand, seven hundred eighty-nine".