127856447871 has 16 divisors (see below), whose sum is σ = 172716096000. Its totient is φ = 84118252608.

The previous prime is 127856447867. The next prime is 127856447933. The reversal of 127856447871 is 178744658721.

It is not a de Polignac number, because 127856447871 - 2² = 127856447867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127856447371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368955 + ... + 625971.

It is an arithmetic number, because the mean of its divisors is an integer number (10794756000).

Almost surely, 2^127856447871 is an apocalyptic number.

127856447871 is a deficient number, since it is larger than the sum of its proper divisors (44859648129).

127856447871 is a wasteful number, since it uses less digits than its factorization.

127856447871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259198.

The product of its digits is 21073920, while the sum is 60.

The spelling of 127856447871 in words is "one hundred twenty-seven billion, eight hundred fifty-six million, four hundred forty-seven thousand, eight hundred seventy-one".