127795567779 has 20 divisors (see below), whose sum is σ = 208259445240. Its totient is φ = 77451858720.

The previous prime is 127795567771. The next prime is 127795567787. The reversal of 127795567779 is 977765597721.

It is an interprime number because it is at equal distance from previous prime (127795567771) and next prime (127795567787).

It is not a de Polignac number, because 127795567779 - 2³ = 127795567771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127795567771) 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 19 ways as a sum of consecutive naturals, for example, 71713794 + ... + 71715575.

It is an arithmetic number, because the mean of its divisors is an integer number (10412972262).

Almost surely, 2^127795567779 is an apocalyptic number.

127795567779 is a deficient number, since it is larger than the sum of its proper divisors (80463877461).

127795567779 is a wasteful number, since it uses less digits than its factorization.

127795567779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143429392 (or 143429383 counting only the distinct ones).

The product of its digits is 408410100, while the sum is 72.

The spelling of 127795567779 in words is "one hundred twenty-seven billion, seven hundred ninety-five million, five hundred sixty-seven thousand, seven hundred seventy-nine".