127042152661 has 2 divisors, whose sum is σ = 127042152662. Its totient is φ = 127042152660.

The previous prime is 127042152659. The next prime is 127042152673. The reversal of 127042152661 is 166251240721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126867754225 + 174398436 = 356185^2 + 13206^2 .

It is a cyclic number.

It is not a de Polignac number, because 127042152661 - 2¹ = 127042152659 is a prime.

It is a super-2 number, since 2×127042152661² (a number of 23 digits) contains 22 as substring.

Together with 127042152659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 127042152661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127042152631) 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, 63521076330 + 63521076331.

It is an arithmetic number, because the mean of its divisors is an integer number (63521076331).

Almost surely, 2^127042152661 is an apocalyptic number.

It is an amenable number.

127042152661 is a deficient number, since it is larger than the sum of its proper divisors (1).

127042152661 is an equidigital number, since it uses as much as digits as its factorization.

127042152661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 127042152661 in words is "one hundred twenty-seven billion, forty-two million, one hundred fifty-two thousand, six hundred sixty-one".