68591616 has 56 divisors (see below), whose sum is σ = 182965344. Its totient is φ = 22855680.

The previous prime is 68591597. The next prime is 68591639. The reversal of 68591616 is 61619586.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23181 + ... + 25971.

Almost surely, 2^68591616 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 68591616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91482672).

68591616 is an abundant number, since it is smaller than the sum of its proper divisors (114373728).

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

68591616 is an equidigital number, since it uses as much as digits as its factorization.

68591616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820 (or 2796 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 68591616 is about 8282.0055542121. The cubic root of 68591616 is about 409.3458058236.

The spelling of 68591616 in words is "sixty-eight million, five hundred ninety-one thousand, six hundred sixteen".