128582285821 has 16 divisors (see below), whose sum is σ = 141870643200. Its totient is φ = 115564241520.

The previous prime is 128582285803. The next prime is 128582285837.

128582285821 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 128582285821 - 2¹¹ = 128582283773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128582585821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583936 + ... + 773398.

It is an arithmetic number, because the mean of its divisors is an integer number (8866915200).

Almost surely, 2^128582285821 is an apocalyptic number.

128582285821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128582285821 is a deficient number, since it is larger than the sum of its proper divisors (13288357379).

128582285821 is a wasteful number, since it uses less digits than its factorization.

128582285821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190176.

The product of its digits is 1638400, while the sum is 52.

The spelling of 128582285821 in words is "one hundred twenty-eight billion, five hundred eighty-two million, two hundred eighty-five thousand, eight hundred twenty-one".