8128189707 has 16 divisors (see below), whose sum is σ = 11824386048. Its totient is φ = 4925523680.

The previous prime is 8128189579. The next prime is 8128189717. The reversal of 8128189707 is 7079818218.

It is not a de Polignac number, because 8128189707 - 2⁷ = 8128189579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8128189707.

It is not an unprimeable number, because it can be changed into a prime (8128189717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382453 + ... + 403145.

It is an arithmetic number, because the mean of its divisors is an integer number (739024128).

Almost surely, 2^8128189707 is an apocalyptic number.

8128189707 is a deficient number, since it is larger than the sum of its proper divisors (3696196341).

8128189707 is a wasteful number, since it uses less digits than its factorization.

8128189707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32610.

The product of its (nonzero) digits is 451584, while the sum is 51.

The square root of 8128189707 is about 90156.4734614215. The cubic root of 8128189707 is about 2010.6259205088.

The spelling of 8128189707 in words is "eight billion, one hundred twenty-eight million, one hundred eighty-nine thousand, seven hundred seven".