68028637328 has 20 divisors (see below), whose sum is σ = 131810538288. Its totient is φ = 34013014560.

The previous prime is 68028637283. The next prime is 68028637373. The reversal of 68028637328 is 82373682086.

It is a Cunningham number, because it is equal to 260823²-1.

It is an interprime number because it is at equal distance from previous prime (68028637283) and next prime (68028637373).

It is a self number, because there is not a number n which added to its sum of digits gives 68028637328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456443 + ... + 586853.

Almost surely, 2^68028637328 is an apocalyptic number.

It is an amenable number.

68028637328 is a deficient number, since it is larger than the sum of its proper divisors (63781900960).

68028637328 is a wasteful number, since it uses less digits than its factorization.

68028637328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163022 (or 163016 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 68028637328 in words is "sixty-eight billion, twenty-eight million, six hundred thirty-seven thousand, three hundred twenty-eight".