127945686791 has 8 divisors (see below), whose sum is σ = 137808083280. Its totient is φ = 118086207552.

The previous prime is 127945686761. The next prime is 127945686809. The reversal of 127945686791 is 197686549721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127945686791 - 2¹⁸ = 127945424647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127945686731) 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 7 ways as a sum of consecutive naturals, for example, 637790 + ... + 814043.

It is an arithmetic number, because the mean of its divisors is an integer number (17226010410).

Almost surely, 2^127945686791 is an apocalyptic number.

127945686791 is a deficient number, since it is larger than the sum of its proper divisors (9862396489).

127945686791 is a wasteful number, since it uses less digits than its factorization.

127945686791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458625.

The product of its digits is 45722880, while the sum is 65.

The spelling of 127945686791 in words is "one hundred twenty-seven billion, nine hundred forty-five million, six hundred eighty-six thousand, seven hundred ninety-one".