17728768905 has 32 divisors (see below), whose sum is σ = 28462080000. Its totient is φ = 9423387072.

The previous prime is 17728768879. The next prime is 17728768907. The reversal of 17728768905 is 50986782771.

It is not a de Polignac number, because 17728768905 - 2⁵ = 17728768873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17728768907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8135106 + ... + 8137284.

It is an arithmetic number, because the mean of its divisors is an integer number (889440000).

Almost surely, 2^17728768905 is an apocalyptic number.

17728768905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17728768905 is a deficient number, since it is larger than the sum of its proper divisors (10733311095).

17728768905 is a wasteful number, since it uses less digits than its factorization.

17728768905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 11854080, while the sum is 60.

The spelling of 17728768905 in words is "seventeen billion, seven hundred twenty-eight million, seven hundred sixty-eight thousand, nine hundred five".