68305913316 has 81 divisors (see below), whose sum is σ = 176945625129. Its totient is φ = 22217180832.

The previous prime is 68305913303. The next prime is 68305913369. The reversal of 68305913316 is 61331950386.

The square root of 68305913316 is 261354.

It is a perfect power (a square), and thus also a powerful number.

68305913316 is a `hidden beast` number, since 6 + 8 + 305 + 9 + 1 + 331 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134792100 + 68171121216 = 11610^2 + 261096^2 .

It is a super-2 number, since 2×68305913316² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 67428826 + ... + 67429838.

Almost surely, 2^68305913316 is an apocalyptic number.

68305913316 is the 261354-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68305913316

68305913316 is an abundant number, since it is smaller than the sum of its proper divisors (108639711813).

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

68305913316 is a wasteful number, since it uses less digits than its factorization.

68305913316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 68305913316 in words is "sixty-eight billion, three hundred five million, nine hundred thirteen thousand, three hundred sixteen".