4128769281 has 32 divisors (see below), whose sum is σ = 6800539648. Its totient is φ = 2169737280.

The previous prime is 4128769231. The next prime is 4128769301. The reversal of 4128769281 is 1829678214.

It is a happy number.

It is not a de Polignac number, because 4128769281 - 2¹¹ = 4128767233 is a prime.

It is a super-2 number, since 2×4128769281² = 34093471551458513922, which contains 22 as substring.

It is the 64256-th Hogben number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128769281.

It is not an unprimeable number, because it can be changed into a prime (4128769231) by changing a digit.

It is a nontrivial repunit in base 64255.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46080 + ... + 101886.

It is an arithmetic number, because the mean of its divisors is an integer number (212516864).

Almost surely, 2^4128769281 is an apocalyptic number.

It is an amenable number.

4128769281 is a deficient number, since it is larger than the sum of its proper divisors (2671770367).

4128769281 is a wasteful number, since it uses less digits than its factorization.

4128769281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56101.

The product of its digits is 387072, while the sum is 48.

The square root of 4128769281 is about 64255.5000058361. The cubic root of 4128769281 is about 1604.2555051018.

The spelling of 4128769281 in words is "four billion, one hundred twenty-eight million, seven hundred sixty-nine thousand, two hundred eighty-one".