68815536 has 80 divisors (see below), whose sum is σ = 185702400. Its totient is φ = 21934080.

The previous prime is 68815519. The next prime is 68815553. The reversal of 68815536 is 63551886.

It is an interprime number because it is at equal distance from previous prime (68815519) and next prime (68815553).

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153040 + ... + 153488.

It is an arithmetic number, because the mean of its divisors is an integer number (2321280).

Almost surely, 2^68815536 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 68815536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92851200).

68815536 is an abundant number, since it is smaller than the sum of its proper divisors (116886864).

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

68815536 is a wasteful number, since it uses less digits than its factorization.

68815536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 588 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 68815536 is about 8295.5130040281. The cubic root of 68815536 is about 409.7907637517.

The spelling of 68815536 in words is "sixty-eight million, eight hundred fifteen thousand, five hundred thirty-six".