168763747367861 has 24 divisors (see below), whose sum is σ = 187293087910440. Its totient is φ = 151840938368000.

The previous prime is 168763747367837. The next prime is 168763747367863.

168763747367861 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 12 ways, for example, as 3183316114225 + 165580431253636 = 1784185^2 + 12867806^2 .

It is a de Polignac number, because none of the positive numbers 2^k-168763747367861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168763747367863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98839010 + ... + 100531971.

It is an arithmetic number, because the mean of its divisors is an integer number (7803878662935).

Almost surely, 2^{168763747367861} is an apocalyptic number.

It is an amenable number.

168763747367861 is a deficient number, since it is larger than the sum of its proper divisors (18529340542579).

168763747367861 is a wasteful number, since it uses less digits than its factorization.

168763747367861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199371145 (or 199371128 counting only the distinct ones).

The product of its digits is 7169347584, while the sum is 80.

The spelling of 168763747367861 in words is "one hundred sixty-eight trillion, seven hundred sixty-three billion, seven hundred forty-seven million, three hundred sixty-seven thousand, eight hundred sixty-one".