168998317790 has 16 divisors (see below), whose sum is σ = 311616411120. Its totient is φ = 65950562880.

The previous prime is 168998317769. The next prime is 168998317793. The reversal of 168998317790 is 97713899861.

It is a self number, because there is not a number n which added to its sum of digits gives 168998317790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168998317793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206095100 + ... + 206095919.

It is an arithmetic number, because the mean of its divisors is an integer number (19476025695).

Almost surely, 2^168998317790 is an apocalyptic number.

168998317790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168998317790 is a deficient number, since it is larger than the sum of its proper divisors (142618093330).

168998317790 is a wasteful number, since it uses less digits than its factorization.

168998317790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412191067.

The product of its (nonzero) digits is 41150592, while the sum is 68.

The spelling of 168998317790 in words is "one hundred sixty-eight billion, nine hundred ninety-eight million, three hundred seventeen thousand, seven hundred ninety".