127897161988 has 12 divisors (see below), whose sum is σ = 223836470172. Its totient is φ = 63943884800.

The previous prime is 127897161983. The next prime is 127897162049. The reversal of 127897161988 is 889161798721.

It can be written as a sum of positive squares in 2 ways, for example, as 7843227844 + 120053934144 = 88562^2 + 346488^2 .

It is a super-2 number, since 2×127897161988² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127897161983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112413 + ... + 1221988.

It is an arithmetic number, because the mean of its divisors is an integer number (18653039181).

Almost surely, 2^127897161988 is an apocalyptic number.

It is an amenable number.

127897161988 is a deficient number, since it is larger than the sum of its proper divisors (95939308184).

127897161988 is a wasteful number, since it uses less digits than its factorization.

127897161988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348102 (or 2348100 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 67.

The spelling of 127897161988 in words is "one hundred twenty-seven billion, eight hundred ninety-seven million, one hundred sixty-one thousand, nine hundred eighty-eight".