68481028634 has 8 divisors (see below), whose sum is σ = 108763986708. Its totient is φ = 32226366400.

The previous prime is 68481028633. The next prime is 68481028643. The reversal of 68481028634 is 43682018486.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59851176025 + 8629852609 = 244645^2 + 92897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (68481028633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007073917 + ... + 1007073984.

Almost surely, 2^68481028634 is an apocalyptic number.

68481028634 is a deficient number, since it is larger than the sum of its proper divisors (40282958074).

68481028634 is a wasteful number, since it uses less digits than its factorization.

68481028634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014147920.

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 68481028634 in words is "sixty-eight billion, four hundred eighty-one million, twenty-eight thousand, six hundred thirty-four".