171878611045684 has 6 divisors (see below), whose sum is σ = 300787569329954. Its totient is φ = 85939305522840.

The previous prime is 171878611045591. The next prime is 171878611045693. The reversal of 171878611045684 is 486540116878171.

It can be written as a sum of positive squares in only one way, i.e., 152474832724900 + 19403778320784 = 12348070^2 + 4404972^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21484826380707 + ... + 21484826380714.

Almost surely, 2^{171878611045684} is an apocalyptic number.

It is an amenable number.

171878611045684 is a deficient number, since it is larger than the sum of its proper divisors (128908958284270).

171878611045684 is a wasteful number, since it uses less digits than its factorization.

171878611045684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42969652761425 (or 42969652761423 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 67.

The spelling of 171878611045684 in words is "one hundred seventy-one trillion, eight hundred seventy-eight billion, six hundred eleven million, forty-five thousand, six hundred eighty-four".