17008728157 has 8 divisors (see below), whose sum is σ = 18010767096. Its totient is φ = 16006858752.

The previous prime is 17008728109. The next prime is 17008728167. The reversal of 17008728157 is 75182780071.

It can be written as a sum of positive squares in 4 ways, for example, as 7834728196 + 9173999961 = 88514^2 + 95781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17008728157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17008728167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205723 + ... + 276295.

It is an arithmetic number, because the mean of its divisors is an integer number (2251345887).

Almost surely, 2^17008728157 is an apocalyptic number.

17008728157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

17008728157 is a deficient number, since it is larger than the sum of its proper divisors (1002038939).

17008728157 is a wasteful number, since it uses less digits than its factorization.

17008728157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84767.

The product of its (nonzero) digits is 219520, while the sum is 46.

The spelling of 17008728157 in words is "seventeen billion, eight million, seven hundred twenty-eight thousand, one hundred fifty-seven".