68815534 has 4 divisors (see below), whose sum is σ = 103223304. Its totient is φ = 34407766.

The previous prime is 68815519. The next prime is 68815553. The reversal of 68815534 is 43551886.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17203882 + ... + 17203885.

It is an arithmetic number, because the mean of its divisors is an integer number (25805826).

Almost surely, 2^68815534 is an apocalyptic number.

68815534 is a deficient number, since it is larger than the sum of its proper divisors (34407770).

68815534 is a wasteful number, since it uses less digits than its factorization.

68815534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407769.

The product of its digits is 115200, while the sum is 40.

The square root of 68815534 is about 8295.5128834810. The cubic root of 68815534 is about 409.7907597818.

The spelling of 68815534 in words is "sixty-eight million, eight hundred fifteen thousand, five hundred thirty-four".