64028905689 has 24 divisors (see below), whose sum is σ = 105151916448. Its totient is φ = 34435712640.

The previous prime is 64028905679. The next prime is 64028905747. The reversal of 64028905689 is 98650982046.

It is not a de Polignac number, because 64028905689 - 2⁴ = 64028905673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64028905679) 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 23 ways as a sum of consecutive naturals, for example, 12808407 + ... + 12813404.

It is an arithmetic number, because the mean of its divisors is an integer number (4381329852).

Almost surely, 2^64028905689 is an apocalyptic number.

It is an amenable number.

64028905689 is a deficient number, since it is larger than the sum of its proper divisors (41123010759).

64028905689 is a wasteful number, since it uses less digits than its factorization.

64028905689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25621845 (or 25621838 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 64028905689 in words is "sixty-four billion, twenty-eight million, nine hundred five thousand, six hundred eighty-nine".