127680520097 has 4 divisors (see below), whose sum is σ = 137502098580. Its totient is φ = 117858941616.

The previous prime is 127680520067. The next prime is 127680520157. The reversal of 127680520097 is 790025086721.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19859573776 + 107820946321 = 140924^2 + 328361^2 .

It is not a de Polignac number, because 127680520097 - 2²² = 127676325793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127680520027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4910789222 + ... + 4910789247.

It is an arithmetic number, because the mean of its divisors is an integer number (34375524645).

Almost surely, 2^127680520097 is an apocalyptic number.

It is an amenable number.

127680520097 is a deficient number, since it is larger than the sum of its proper divisors (9821578483).

127680520097 is an equidigital number, since it uses as much as digits as its factorization.

127680520097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821578482.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 127680520097 in words is "one hundred twenty-seven billion, six hundred eighty million, five hundred twenty thousand, ninety-seven".