7128201643 has 16 divisors (see below), whose sum is σ = 7734165120. Its totient is φ = 6544720000.

The previous prime is 7128201637. The next prime is 7128201673. The reversal of 7128201643 is 3461028217.

7128201643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7128201643 - 2⁵ = 7128201611 is a prime.

It is a super-2 number, since 2×7128201643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7128201599 and 7128201608.

It is not an unprimeable number, because it can be changed into a prime (7128201673) 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, 104268 + ... + 158518.

It is an arithmetic number, because the mean of its divisors is an integer number (483385320).

Almost surely, 2^7128201643 is an apocalyptic number.

7128201643 is a deficient number, since it is larger than the sum of its proper divisors (605963477).

7128201643 is a wasteful number, since it uses less digits than its factorization.

7128201643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54458.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7128201643 is about 84428.6778470444. The cubic root of 7128201643 is about 1924.5387453248.

The spelling of 7128201643 in words is "seven billion, one hundred twenty-eight million, two hundred one thousand, six hundred forty-three".