171204665541 has 16 divisors (see below), whose sum is σ = 280951246464. Its totient is φ = 90305757504.

The previous prime is 171204665539. The next prime is 171204665579. The reversal of 171204665541 is 145566402171.

It is not a de Polignac number, because 171204665541 - 2¹ = 171204665539 is a prime.

It is a super-2 number, since 2×171204665541² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 171204665493 and 171204665502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171204666541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313561386 + ... + 313561931.

It is an arithmetic number, because the mean of its divisors is an integer number (17559452904).

Almost surely, 2^171204665541 is an apocalyptic number.

It is an amenable number.

171204665541 is a deficient number, since it is larger than the sum of its proper divisors (109746580923).

171204665541 is a wasteful number, since it uses less digits than its factorization.

171204665541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627123340.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 171204665541 in words is "one hundred seventy-one billion, two hundred four million, six hundred sixty-five thousand, five hundred forty-one".