2128234984581 has 16 divisors (see below), whose sum is σ = 2847129901056. Its totient is φ = 1414087098816.

The previous prime is 2128234984567. The next prime is 2128234984597. The reversal of 2128234984581 is 1854894328212.

It is not a de Polignac number, because 2128234984581 - 2¹⁰ = 2128234983557 is a prime.

It is a super-2 number, since 2×2128234984581² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128224984581) 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, 903051 + ... + 2252103.

It is an arithmetic number, because the mean of its divisors is an integer number (177945618816).

Almost surely, 2^{2128234984581} is an apocalyptic number.

It is an amenable number.

2128234984581 is a deficient number, since it is larger than the sum of its proper divisors (718894916475).

2128234984581 is a wasteful number, since it uses less digits than its factorization.

2128234984581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350812.

The product of its digits is 8847360, while the sum is 57.

The spelling of 2128234984581 in words is "two trillion, one hundred twenty-eight billion, two hundred thirty-four million, nine hundred eighty-four thousand, five hundred eighty-one".