171871471764 has 18 divisors (see below), whose sum is σ = 434452887050. Its totient is φ = 57290490576.

The previous prime is 171871471763. The next prime is 171871471769. The reversal of 171871471764 is 467174178171.

It can be written as a sum of positive squares in only one way, i.e., 98263440900 + 73608030864 = 313470^2 + 271308^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 171871471764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171871471763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2387103739 + ... + 2387103810.

Almost surely, 2^171871471764 is an apocalyptic number.

It is an amenable number.

171871471764 is an abundant number, since it is smaller than the sum of its proper divisors (262581415286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171871471764 is a wasteful number, since it uses less digits than its factorization.

171871471764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774207559 (or 4774207554 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 54.

The spelling of 171871471764 in words is "one hundred seventy-one billion, eight hundred seventy-one million, four hundred seventy-one thousand, seven hundred sixty-four".