127802966549 has 2 divisors, whose sum is σ = 127802966550. Its totient is φ = 127802966548.

The previous prime is 127802966497. The next prime is 127802966597. The reversal of 127802966549 is 945669208721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76462204324 + 51340762225 = 276518^2 + 226585^2 .

It is a cyclic number.

It is not a de Polignac number, because 127802966549 - 2¹⁶ = 127802901013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127802966449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63901483274 + 63901483275.

It is an arithmetic number, because the mean of its divisors is an integer number (63901483275).

Almost surely, 2^127802966549 is an apocalyptic number.

It is an amenable number.

127802966549 is a deficient number, since it is larger than the sum of its proper divisors (1).

127802966549 is an equidigital number, since it uses as much as digits as its factorization.

127802966549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 127802966549 in words is "one hundred twenty-seven billion, eight hundred two million, nine hundred sixty-six thousand, five hundred forty-nine".