17157112705 has 4 divisors (see below), whose sum is σ = 20588535252. Its totient is φ = 13725690160.

The previous prime is 17157112669. The next prime is 17157112711. The reversal of 17157112705 is 50721175171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2671545969 + 14485566736 = 51687^2 + 120356^2 .

It is not a de Polignac number, because 17157112705 - 2¹⁹ = 17156588417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1715711266 + ... + 1715711275.

It is an arithmetic number, because the mean of its divisors is an integer number (5147133813).

Almost surely, 2^17157112705 is an apocalyptic number.

It is an amenable number.

17157112705 is a deficient number, since it is larger than the sum of its proper divisors (3431422547).

17157112705 is an equidigital number, since it uses as much as digits as its factorization.

17157112705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431422546.

The product of its (nonzero) digits is 17150, while the sum is 37.

Adding to 17157112705 its reverse (50721175171), we get a palindrome (67878287876).

The spelling of 17157112705 in words is "seventeen billion, one hundred fifty-seven million, one hundred twelve thousand, seven hundred five".