127855558721 has 16 divisors (see below), whose sum is σ = 141597490176. Its totient is φ = 114478800000.

The previous prime is 127855558697. The next prime is 127855558729.

127855558721 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 127855558721 - 2¹⁴ = 127855542337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127855558729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89060 + ... + 513461.

It is an arithmetic number, because the mean of its divisors is an integer number (8849843136).

Almost surely, 2^127855558721 is an apocalyptic number.

127855558721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127855558721 is a deficient number, since it is larger than the sum of its proper divisors (13741931455).

127855558721 is a wasteful number, since it uses less digits than its factorization.

127855558721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602824.

The product of its digits is 7840000, while the sum is 56.

The spelling of 127855558721 in words is "one hundred twenty-seven billion, eight hundred fifty-five million, five hundred fifty-eight thousand, seven hundred twenty-one".