17728490709 has 16 divisors (see below), whose sum is σ = 26421709440. Its totient is φ = 11748218400.

The previous prime is 17728490699. The next prime is 17728490729. The reversal of 17728490709 is 90709482771.

17728490709 is a `hidden beast` number, since 17 + 72 + 8 + 490 + 70 + 9 = 666.

It is not a de Polignac number, because 17728490709 - 2⁷ = 17728490581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17728490729) 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, 1961392 + ... + 1970409.

It is an arithmetic number, because the mean of its divisors is an integer number (1651356840).

Almost surely, 2^17728490709 is an apocalyptic number.

It is an amenable number.

17728490709 is a deficient number, since it is larger than the sum of its proper divisors (8693218731).

17728490709 is a wasteful number, since it uses less digits than its factorization.

17728490709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931977 (or 3931971 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 17728490709 in words is "seventeen billion, seven hundred twenty-eight million, four hundred ninety thousand, seven hundred nine".