27553311649 has 2 divisors, whose sum is σ = 27553311650. Its totient is φ = 27553311648.

The previous prime is 27553311601. The next prime is 27553311671. The reversal of 27553311649 is 94611335572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25259380624 + 2293931025 = 158932^2 + 47895^2 .

It is a cyclic number.

It is not a de Polignac number, because 27553311649 - 2⁷ = 27553311521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27553311599 and 27553311608.

It is not a weakly prime, because it can be changed into another prime (27553318649) 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, 13776655824 + 13776655825.

It is an arithmetic number, because the mean of its divisors is an integer number (13776655825).

Almost surely, 2^27553311649 is an apocalyptic number.

It is an amenable number.

27553311649 is a deficient number, since it is larger than the sum of its proper divisors (1).

27553311649 is an equidigital number, since it uses as much as digits as its factorization.

27553311649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The spelling of 27553311649 in words is "twenty-seven billion, five hundred fifty-three million, three hundred eleven thousand, six hundred forty-nine".