17217136157 has 4 divisors (see below), whose sum is σ = 18541531260. Its totient is φ = 15892741056.

The previous prime is 17217136147. The next prime is 17217136163. The reversal of 17217136157 is 75163171271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75163171271 = 1607 ⋅46772353.

It can be written as a sum of positive squares in 2 ways, for example, as 11558185081 + 5658951076 = 107509^2 + 75226^2 .

It is a cyclic number.

It is not a de Polignac number, because 17217136157 - 2²² = 17212941853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17217136147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662197532 + ... + 662197557.

It is an arithmetic number, because the mean of its divisors is an integer number (4635382815).

Almost surely, 2^17217136157 is an apocalyptic number.

It is an amenable number.

17217136157 is a deficient number, since it is larger than the sum of its proper divisors (1324395103).

17217136157 is a wasteful number, since it uses less digits than its factorization.

17217136157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324395102.

The product of its digits is 61740, while the sum is 41.

The spelling of 17217136157 in words is "seventeen billion, two hundred seventeen million, one hundred thirty-six thousand, one hundred fifty-seven".