13555042549 has 2 divisors, whose sum is σ = 13555042550. Its totient is φ = 13555042548.

The previous prime is 13555042541. The next prime is 13555042573. The reversal of 13555042549 is 94524055531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13402692900 + 152349649 = 115770^2 + 12343^2 .

It is a cyclic number.

It is not a de Polignac number, because 13555042549 - 2³ = 13555042541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13555042541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777521274 + 6777521275.

It is an arithmetic number, because the mean of its divisors is an integer number (6777521275).

Almost surely, 2^13555042549 is an apocalyptic number.

It is an amenable number.

13555042549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13555042549 is an equidigital number, since it uses as much as digits as its factorization.

13555042549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 13555042549 in words is "thirteen billion, five hundred fifty-five million, forty-two thousand, five hundred forty-nine".