168305994756 has 72 divisors (see below), whose sum is σ = 435714823544. Its totient is φ = 54762946560.

The previous prime is 168305994749. The next prime is 168305994817. The reversal of 168305994756 is 657499503861.

168305994756 is a `hidden beast` number, since 1 + 6 + 8 + 30 + 599 + 4 + 7 + 5 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12273094656 + 156032900100 = 110784^2 + 395010^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168305994693 and 168305994702.

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, 75205 + ... + 585036.

Almost surely, 2^168305994756 is an apocalyptic number.

It is an amenable number.

168305994756 is an abundant number, since it is smaller than the sum of its proper divisors (267408828788).

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

168305994756 is a wasteful number, since it uses less digits than its factorization.

168305994756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660421 (or 660416 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 168305994756 in words is "one hundred sixty-eight billion, three hundred five million, nine hundred ninety-four thousand, seven hundred fifty-six".