127281864220 has 48 divisors (see below), whose sum is σ = 305504478720. Its totient is φ = 43635495744.

The previous prime is 127281864217. The next prime is 127281864221. The reversal of 127281864220 is 22468182721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127281864221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1771761 + ... + 1842199.

It is an arithmetic number, because the mean of its divisors is an integer number (6364676640).

Almost surely, 2^127281864220 is an apocalyptic number.

127281864220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127281864220 is an abundant number, since it is smaller than the sum of its proper divisors (178222614500).

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

127281864220 is a wasteful number, since it uses less digits than its factorization.

127281864220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83362 (or 83360 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 127281864220 in words is "one hundred twenty-seven billion, two hundred eighty-one million, eight hundred sixty-four thousand, two hundred twenty".