27390789553 has 2 divisors, whose sum is σ = 27390789554. Its totient is φ = 27390789552.

The previous prime is 27390789541. The next prime is 27390789563. The reversal of 27390789553 is 35598709372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18223110049 + 9167679504 = 134993^2 + 95748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27390789553 is a prime.

It is not a weakly prime, because it can be changed into another prime (27390789563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13695394776 + 13695394777.

It is an arithmetic number, because the mean of its divisors is an integer number (13695394777).

Almost surely, 2^27390789553 is an apocalyptic number.

It is an amenable number.

27390789553 is a deficient number, since it is larger than the sum of its proper divisors (1).

27390789553 is an equidigital number, since it uses as much as digits as its factorization.

27390789553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14288400, while the sum is 58.

The spelling of 27390789553 in words is "twenty-seven billion, three hundred ninety million, seven hundred eighty-nine thousand, five hundred fifty-three".