168949949860 has 48 divisors (see below), whose sum is σ = 370396580400. Its totient is φ = 64650991104.

The previous prime is 168949949821. The next prime is 168949949891. The reversal of 168949949860 is 68949949861.

168949949860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 4887687744 + 164062262116 = 69912^2 + 405046^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272987 + ... + 1399426.

It is an arithmetic number, because the mean of its divisors is an integer number (7716595425).

Almost surely, 2^168949949860 is an apocalyptic number.

168949949860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168949949860 is an abundant number, since it is smaller than the sum of its proper divisors (201446630540).

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

168949949860 is a wasteful number, since it uses less digits than its factorization.

168949949860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672560 (or 2672558 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 73.

Subtracting from 168949949860 its reverse (68949949861), we obtain a palindrome (99999999999).

The spelling of 168949949860 in words is "one hundred sixty-eight billion, nine hundred forty-nine million, nine hundred forty-nine thousand, eight hundred sixty".