128035794321 has 12 divisors (see below), whose sum is σ = 195819450372. Its totient is φ = 80336184576.

The previous prime is 128035794307. The next prime is 128035794349. The reversal of 128035794321 is 123497530821.

It is a happy number.

128035794321 is a `hidden beast` number, since 12 + 8 + 0 + 3 + 579 + 43 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 109455105600 + 18580688721 = 330840^2 + 136311^2 .

It is not a de Polignac number, because 128035794321 - 2⁷ = 128035794193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128035794421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418417476 + ... + 418417781.

It is an arithmetic number, because the mean of its divisors is an integer number (16318287531).

Almost surely, 2^128035794321 is an apocalyptic number.

It is an amenable number.

128035794321 is a deficient number, since it is larger than the sum of its proper divisors (67783656051).

128035794321 is a wasteful number, since it uses less digits than its factorization.

128035794321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836835280 (or 836835277 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 128035794321 in words is "one hundred twenty-eight billion, thirty-five million, seven hundred ninety-four thousand, three hundred twenty-one".