127680520145 has 8 divisors (see below), whose sum is σ = 153874207656. Its totient is φ = 101706027136.

The previous prime is 127680520067. The next prime is 127680520157. The reversal of 127680520145 is 541025086721.

It can be written as a sum of positive squares in 4 ways, for example, as 22677950464 + 105002569681 = 150592^2 + 324041^2 .

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 127680520145 - 2¹⁰ = 127680519121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54797342 + ... + 54799671.

It is an arithmetic number, because the mean of its divisors is an integer number (19234275957).

Almost surely, 2^127680520145 is an apocalyptic number.

It is an amenable number.

127680520145 is a deficient number, since it is larger than the sum of its proper divisors (26193687511).

127680520145 is a wasteful number, since it uses less digits than its factorization.

127680520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109597251.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 127680520145 in words is "one hundred twenty-seven billion, six hundred eighty million, five hundred twenty thousand, one hundred forty-five".