68130816 has 96 divisors (see below), whose sum is σ = 195839280. Its totient is φ = 20938752.

The previous prime is 68130809. The next prime is 68130833. The reversal of 68130816 is 61803186.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 79446 + ... + 80298.

Almost surely, 2^68130816 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 68130816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97919640).

68130816 is an abundant number, since it is smaller than the sum of its proper divisors (127708464).

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

68130816 is a wasteful number, since it uses less digits than its factorization.

68130816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 68130816 is about 8254.1393252113. The cubic root of 68130816 is about 408.4270806642.

The spelling of 68130816 in words is "sixty-eight million, one hundred thirty thousand, eight hundred sixteen".