127146138781 has 2 divisors, whose sum is σ = 127146138782. Its totient is φ = 127146138780.

The previous prime is 127146138739. The next prime is 127146138787. The reversal of 127146138781 is 187831641721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103481239225 + 23664899556 = 321685^2 + 153834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127146138781 is a prime.

It is a super-2 number, since 2×127146138781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127146138787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63573069390 + 63573069391.

It is an arithmetic number, because the mean of its divisors is an integer number (63573069391).

Almost surely, 2^127146138781 is an apocalyptic number.

It is an amenable number.

127146138781 is a deficient number, since it is larger than the sum of its proper divisors (1).

127146138781 is an equidigital number, since it uses as much as digits as its factorization.

127146138781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 49.

The spelling of 127146138781 in words is "one hundred twenty-seven billion, one hundred forty-six million, one hundred thirty-eight thousand, seven hundred eighty-one".