171287855344788 has 96 divisors (see below), whose sum is σ = 492881525692416. Its totient is φ = 45085008074112.

The previous prime is 171287855344769. The next prime is 171287855344789. The reversal of 171287855344788 is 887443558782171.

171287855344788 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171287855344789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155372206 + ... + 156470757.

It is an arithmetic number, because the mean of its divisors is an integer number (5134182559296).

Almost surely, 2^{171287855344788} is an apocalyptic number.

It is an amenable number.

171287855344788 is an abundant number, since it is smaller than the sum of its proper divisors (321593670347628).

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

171287855344788 is a wasteful number, since it uses less digits than its factorization.

171287855344788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311843493 (or 311843491 counting only the distinct ones).

The product of its digits is 3371827200, while the sum is 78.

The spelling of 171287855344788 in words is "one hundred seventy-one trillion, two hundred eighty-seven billion, eight hundred fifty-five million, three hundred forty-four thousand, seven hundred eighty-eight".