168502051885 has 16 divisors (see below), whose sum is σ = 214135208496. Its totient is φ = 126849328128.

The previous prime is 168502051871. The next prime is 168502051901. The reversal of 168502051885 is 588150205861.

It can be written as a sum of positive squares in 8 ways, for example, as 75533481 + 168426518404 = 8691^2 + 410398^2 .

It is not a de Polignac number, because 168502051885 - 2²⁹ = 167965180973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305167 + ... + 655843.

It is an arithmetic number, because the mean of its divisors is an integer number (13383450531).

Almost surely, 2^168502051885 is an apocalyptic number.

It is an amenable number.

168502051885 is a deficient number, since it is larger than the sum of its proper divisors (45633156611).

168502051885 is a wasteful number, since it uses less digits than its factorization.

168502051885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356352.

The product of its (nonzero) digits is 768000, while the sum is 49.

The spelling of 168502051885 in words is "one hundred sixty-eight billion, five hundred two million, fifty-one thousand, eight hundred eighty-five".