127249246661 has 2 divisors, whose sum is σ = 127249246662. Its totient is φ = 127249246660.

The previous prime is 127249246639. The next prime is 127249246697. The reversal of 127249246661 is 166642942721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96297881761 + 30951364900 = 310319^2 + 175930^2 .

It is a cyclic number.

It is not a de Polignac number, because 127249246661 - 2³⁴ = 110069377477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127249246261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63624623330 + 63624623331.

It is an arithmetic number, because the mean of its divisors is an integer number (63624623331).

Almost surely, 2^127249246661 is an apocalyptic number.

It is an amenable number.

127249246661 is a deficient number, since it is larger than the sum of its proper divisors (1).

127249246661 is an equidigital number, since it uses as much as digits as its factorization.

127249246661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The spelling of 127249246661 in words is "one hundred twenty-seven billion, two hundred forty-nine million, two hundred forty-six thousand, six hundred sixty-one".