68515568 has 40 divisors (see below), whose sum is σ = 146883456. Its totient is φ = 30699200.

The previous prime is 68515523. The next prime is 68515589. The reversal of 68515568 is 86551586.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9755 + ... + 15237.

Almost surely, 2^68515568 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 68515568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73441728).

68515568 is an abundant number, since it is smaller than the sum of its proper divisors (78367888).

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

68515568 is a wasteful number, since it uses less digits than its factorization.

68515568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573 (or 5567 counting only the distinct ones).

The product of its digits is 288000, while the sum is 44.

The square root of 68515568 is about 8277.4131224677. The cubic root of 68515568 is about 409.1944683696.

The spelling of 68515568 in words is "sixty-eight million, five hundred fifteen thousand, five hundred sixty-eight".