27450143549 has 2 divisors, whose sum is σ = 27450143550. Its totient is φ = 27450143548.

The previous prime is 27450143443. The next prime is 27450143563. The reversal of 27450143549 is 94534105472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27078348025 + 371795524 = 164555^2 + 19282^2 .

It is a cyclic number.

It is not a de Polignac number, because 27450143549 - 2¹⁶ = 27450078013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27450143579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13725071774 + 13725071775.

It is an arithmetic number, because the mean of its divisors is an integer number (13725071775).

Almost surely, 2^27450143549 is an apocalyptic number.

It is an amenable number.

27450143549 is a deficient number, since it is larger than the sum of its proper divisors (1).

27450143549 is an equidigital number, since it uses as much as digits as its factorization.

27450143549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 27450143549 in words is "twenty-seven billion, four hundred fifty million, one hundred forty-three thousand, five hundred forty-nine".