127866454506881 has 16 divisors (see below), whose sum is σ = 135376246017600. Its totient is φ = 120434681141568.

The previous prime is 127866454506827. The next prime is 127866454506887. The reversal of 127866454506881 is 188605454668721.

It is a cyclic number.

It is not a de Polignac number, because 127866454506881 - 2¹⁰ = 127866454505857 is a prime.

It is a super-2 number, since 2×127866454506881² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127866454506887) 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, 263759810 + ... + 264244148.

It is an arithmetic number, because the mean of its divisors is an integer number (8461015376100).

Almost surely, 2^{127866454506881} is an apocalyptic number.

It is an amenable number.

127866454506881 is a deficient number, since it is larger than the sum of its proper divisors (7509791510719).

127866454506881 is a wasteful number, since it uses less digits than its factorization.

127866454506881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564848.

The product of its (nonzero) digits is 619315200, while the sum is 71.

The spelling of 127866454506881 in words is "one hundred twenty-seven trillion, eight hundred sixty-six billion, four hundred fifty-four million, five hundred six thousand, eight hundred eighty-one".