17909528085 has 40 divisors (see below), whose sum is σ = 32115394080. Its totient is φ = 9548503776.

The previous prime is 17909528053. The next prime is 17909528093. The reversal of 17909528085 is 58082590971.

It is not a de Polignac number, because 17909528085 - 2⁵ = 17909528053 is a prime.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 1622194 + ... + 1633196.

It is an arithmetic number, because the mean of its divisors is an integer number (802884852).

Almost surely, 2^17909528085 is an apocalyptic number.

17909528085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17909528085 is a deficient number, since it is larger than the sum of its proper divisors (14205865995).

17909528085 is a wasteful number, since it uses less digits than its factorization.

17909528085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15039 (or 15030 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 17909528085 in words is "seventeen billion, nine hundred nine million, five hundred twenty-eight thousand, eighty-five".