168404338508 has 24 divisors (see below), whose sum is σ = 336817367712. Its totient is φ = 72171425664.

The previous prime is 168404338489. The next prime is 168404338511. The reversal of 168404338508 is 805833404861.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060960 + ... + 2141112.

It is an arithmetic number, because the mean of its divisors is an integer number (14034056988).

Almost surely, 2^168404338508 is an apocalyptic number.

It is an amenable number.

168404338508 is an abundant number, since it is smaller than the sum of its proper divisors (168413029204).

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

168404338508 is a wasteful number, since it uses less digits than its factorization.

168404338508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155201 (or 155199 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 168404338508 in words is "one hundred sixty-eight billion, four hundred four million, three hundred thirty-eight thousand, five hundred eight".