171557202011 has 8 divisors (see below), whose sum is σ = 184963156560. Its totient is φ = 158181139872.

The previous prime is 171557201947. The next prime is 171557202013. The reversal of 171557202011 is 110202755171.

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

It is a cyclic number.

It is not a de Polignac number, because 171557202011 - 2⁶ = 171557201947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171557202013) 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, 7461176 + ... + 7484133.

It is an arithmetic number, because the mean of its divisors is an integer number (23120394570).

Almost surely, 2^171557202011 is an apocalyptic number.

171557202011 is a deficient number, since it is larger than the sum of its proper divisors (13405954549).

171557202011 is a wasteful number, since it uses less digits than its factorization.

171557202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14946205.

The product of its (nonzero) digits is 4900, while the sum is 32.

Adding to 171557202011 its reverse (110202755171), we get a palindrome (281759957182).

The spelling of 171557202011 in words is "one hundred seventy-one billion, five hundred fifty-seven million, two hundred two thousand, eleven".