12128552469 has 64 divisors (see below), whose sum is σ = 20061216000. Its totient is φ = 7180012800.

The previous prime is 12128552459. The next prime is 12128552479. The reversal of 12128552469 is 96425582121.

12128552469 is a `hidden beast` number, since 12 + 1 + 28 + 552 + 4 + 69 = 666.

It is an interprime number because it is at equal distance from previous prime (12128552459) and next prime (12128552479).

It is not a de Polignac number, because 12128552469 - 2¹⁶ = 12128486933 is a prime.

It is a super-2 number, since 2×12128552469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128552459) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2697187 + ... + 2701679.

It is an arithmetic number, because the mean of its divisors is an integer number (313456500).

Almost surely, 2^12128552469 is an apocalyptic number.

It is an amenable number.

12128552469 is a deficient number, since it is larger than the sum of its proper divisors (7932663531).

12128552469 is a wasteful number, since it uses less digits than its factorization.

12128552469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723 (or 4717 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 12128552469 in words is "twelve billion, one hundred twenty-eight million, five hundred fifty-two thousand, four hundred sixty-nine".