127289221764 has 24 divisors (see below), whose sum is σ = 297618070848. Its totient is φ = 42342613920.

The previous prime is 127289221751. The next prime is 127289221817. The reversal of 127289221764 is 467122982721.

It is a happy 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, 10884747 + ... + 10896434.

It is an arithmetic number, because the mean of its divisors is an integer number (12400752952).

Almost surely, 2^127289221764 is an apocalyptic number.

It is an amenable number.

127289221764 is an abundant number, since it is smaller than the sum of its proper divisors (170328849084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127289221764 is a wasteful number, since it uses less digits than its factorization.

127289221764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21781675 (or 21781673 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 127289221764 in words is "one hundred twenty-seven billion, two hundred eighty-nine million, two hundred twenty-one thousand, seven hundred sixty-four".