127896985166 has 4 divisors (see below), whose sum is σ = 191845477752. Its totient is φ = 63948492582.

The previous prime is 127896985133. The next prime is 127896985193. The reversal of 127896985166 is 661589698721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 127896985096 and 127896985105.

It is a congruent number.

It is an unprimeable number.

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, 31974246290 + ... + 31974246293.

It is an arithmetic number, because the mean of its divisors is an integer number (47961369438).

Almost surely, 2^127896985166 is an apocalyptic number.

127896985166 is a deficient number, since it is larger than the sum of its proper divisors (63948492586).

127896985166 is an equidigital number, since it uses as much as digits as its factorization.

127896985166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63948492585.

The product of its digits is 78382080, while the sum is 68.

The spelling of 127896985166 in words is "one hundred twenty-seven billion, eight hundred ninety-six million, nine hundred eighty-five thousand, one hundred sixty-six".