127555000649 has 2 divisors, whose sum is σ = 127555000650. Its totient is φ = 127555000648.

The previous prime is 127555000637. The next prime is 127555000709. The reversal of 127555000649 is 946000555721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72062718025 + 55492282624 = 268445^2 + 235568^2 .

It is a cyclic number.

It is not a de Polignac number, because 127555000649 - 2²⁸ = 127286565193 is a prime.

It is not a weakly prime, because it can be changed into another prime (127555000849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63777500324 + 63777500325.

It is an arithmetic number, because the mean of its divisors is an integer number (63777500325).

Almost surely, 2^127555000649 is an apocalyptic number.

It is an amenable number.

127555000649 is a deficient number, since it is larger than the sum of its proper divisors (1).

127555000649 is an equidigital number, since it uses as much as digits as its factorization.

127555000649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 127555000649 in words is "one hundred twenty-seven billion, five hundred fifty-five million, six hundred forty-nine", and thus it is an aban number.