128769691392 has 54 divisors (see below), whose sum is σ = 371274772232. Its totient is φ = 42923229696.

The previous prime is 128769691381. The next prime is 128769691397. The reversal of 128769691392 is 293196967821.

128769691392 is a `hidden beast` number, since 1 + 2 + 8 + 76 + 96 + 91 + 392 = 666.

It is a super-3 number, since 3×128769691392³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128769691397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27942508 + ... + 27947115.

Almost surely, 2^128769691392 is an apocalyptic number.

128769691392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128769691392 is an abundant number, since it is smaller than the sum of its proper divisors (242505080840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128769691392 is an equidigital number, since it uses as much as digits as its factorization.

128769691392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55889645 (or 55889628 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 128769691392 in words is "one hundred twenty-eight billion, seven hundred sixty-nine million, six hundred ninety-one thousand, three hundred ninety-two".