128229164281 has 9 divisors (see below), whose sum is σ = 128681589711. Its totient is φ = 127778327712.

The previous prime is 128229164249. The next prime is 128229164299. The reversal of 128229164281 is 182461922821.

It is a happy number.

The square root of 128229164281 is 358091.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14379607225 + 113849557056 = 119915^2 + 337416^2 .

It is not a de Polignac number, because 128229164281 - 2⁵ = 128229164249 is a prime.

It is a super-2 number, since 2×128229164281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128229164881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 155052990 + ... + 155053816.

Almost surely, 2^128229164281 is an apocalyptic number.

128229164281 is the 358091-st square number.

128229164281 is the 179046-th centered octagonal number.

It is an amenable number.

128229164281 is a deficient number, since it is larger than the sum of its proper divisors (452425430).

128229164281 is an frugal number, since it uses more digits than its factorization.

128229164281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520 (or 1260 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The spelling of 128229164281 in words is "one hundred twenty-eight billion, two hundred twenty-nine million, one hundred sixty-four thousand, two hundred eighty-one".