168388536687 has 16 divisors (see below), whose sum is σ = 258550778112. Its totient is φ = 95487500160.

The previous prime is 168388536677. The next prime is 168388536737. The reversal of 168388536687 is 786635883861.

It is not a de Polignac number, because 168388536687 - 2¹² = 168388532591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168388536637) 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, 30602218 + ... + 30607719.

It is an arithmetic number, because the mean of its divisors is an integer number (16159423632).

Almost surely, 2^168388536687 is an apocalyptic number.

168388536687 is a deficient number, since it is larger than the sum of its proper divisors (90162241425).

168388536687 is a wasteful number, since it uses less digits than its factorization.

168388536687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61210078.

The product of its digits is 278691840, while the sum is 69.

The spelling of 168388536687 in words is "one hundred sixty-eight billion, three hundred eighty-eight million, five hundred thirty-six thousand, six hundred eighty-seven".