27456794789 has 2 divisors, whose sum is σ = 27456794790. Its totient is φ = 27456794788.

The previous prime is 27456794747. The next prime is 27456794861. The reversal of 27456794789 is 98749765472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21334984225 + 6121810564 = 146065^2 + 78242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27456794789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27456754789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13728397394 + 13728397395.

It is an arithmetic number, because the mean of its divisors is an integer number (13728397395).

Almost surely, 2^27456794789 is an apocalyptic number.

It is an amenable number.

27456794789 is a deficient number, since it is larger than the sum of its proper divisors (1).

27456794789 is an equidigital number, since it uses as much as digits as its factorization.

27456794789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 68.

The spelling of 27456794789 in words is "twenty-seven billion, four hundred fifty-six million, seven hundred ninety-four thousand, seven hundred eighty-nine".