168515815415808 has 672 divisors, whose sum is σ = 564248481010560. Its totient is φ = 44465730355200.

The previous prime is 168515815415797. The next prime is 168515815415861. The reversal of 168515815415808 is 808514518515861.

It is a tau number, because it is divible by the number of its divisors (672).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 803112508 + ... + 803322308.

Almost surely, 2^{168515815415808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168515815415808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282124240505280).

168515815415808 is an abundant number, since it is smaller than the sum of its proper divisors (395732665594752).

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

168515815415808 is a wasteful number, since it uses less digits than its factorization.

168515815415808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209896 (or 209865 counting only the distinct ones).

The product of its (nonzero) digits is 61440000, while the sum is 66.

The spelling of 168515815415808 in words is "one hundred sixty-eight trillion, five hundred fifteen billion, eight hundred fifteen million, four hundred fifteen thousand, eight hundred eight".