68416816 has 40 divisors (see below), whose sum is σ = 144268544. Its totient is φ = 31242240.

The previous prime is 68416801. The next prime is 68416837. The reversal of 68416816 is 61861486.

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, 18481 + ... + 21871.

Almost surely, 2^68416816 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 68416816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72134272).

68416816 is an abundant number, since it is smaller than the sum of its proper divisors (75851728).

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

68416816 is a wasteful number, since it uses less digits than its factorization.

68416816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509 (or 3503 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 68416816 is about 8271.4458228293. The cubic root of 68416816 is about 408.9977821629.

The spelling of 68416816 in words is "sixty-eight million, four hundred sixteen thousand, eight hundred sixteen".