168136547904 has 168 divisors, whose sum is σ = 535238370720. Its totient is φ = 51734232576.

The previous prime is 168136547899. The next prime is 168136547923. The reversal of 168136547904 is 409745631861.

168136547904 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 3 + 6 + 547 + 90 + 4 = 666.

168136547904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4159 + ... + 579905.

Almost surely, 2^168136547904 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 168136547904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267619185360).

168136547904 is an abundant number, since it is smaller than the sum of its proper divisors (367101822816).

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

168136547904 is a wasteful number, since it uses less digits than its factorization.

168136547904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575794 (or 575765 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 168136547904 in words is "one hundred sixty-eight billion, one hundred thirty-six million, five hundred forty-seven thousand, nine hundred four".