171911860399 has 8 divisors (see below), whose sum is σ = 179412675552. Its totient is φ = 164413244160.

The previous prime is 171911860313. The next prime is 171911860411. The reversal of 171911860399 is 993068119171.

171911860399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 171911860399 - 2⁷ = 171911860271 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 (171911860199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388954 + ... + 703639.

It is an arithmetic number, because the mean of its divisors is an integer number (22426584444).

Almost surely, 2^171911860399 is an apocalyptic number.

171911860399 is a deficient number, since it is larger than the sum of its proper divisors (7500815153).

171911860399 is a wasteful number, since it uses less digits than its factorization.

171911860399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099457.

The product of its (nonzero) digits is 734832, while the sum is 55.

The spelling of 171911860399 in words is "one hundred seventy-one billion, nine hundred eleven million, eight hundred sixty thousand, three hundred ninety-nine".