127968539409 has 6 divisors (see below), whose sum is σ = 184843445826. Its totient is φ = 85312359600.

The previous prime is 127968539399. The next prime is 127968539471. The reversal of 127968539409 is 904935869721.

127968539409 is a `hidden beast` number, since 1 + 2 + 7 + 96 + 8 + 539 + 4 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 107361075600 + 20607463809 = 327660^2 + 143553^2 .

It is not a de Polignac number, because 127968539409 - 2¹⁶ = 127968473873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127968539009) 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 in 5 ways as a sum of consecutive naturals, for example, 7109363292 + ... + 7109363309.

It is an arithmetic number, because the mean of its divisors is an integer number (30807240971).

It is a 1-persistent number, because it is pandigital, but 2⋅127968539409 = 255937078818 is not.

Almost surely, 2^127968539409 is an apocalyptic number.

It is an amenable number.

127968539409 is a deficient number, since it is larger than the sum of its proper divisors (56874906417).

127968539409 is a wasteful number, since it uses less digits than its factorization.

127968539409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14218726607 (or 14218726604 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 127968539409 in words is "one hundred twenty-seven billion, nine hundred sixty-eight million, five hundred thirty-nine thousand, four hundred nine".