68817445128 has 40 divisors (see below), whose sum is σ = 192752568030. Its totient is φ = 22939148160.

The previous prime is 68817445127. The next prime is 68817445129. The reversal of 68817445128 is 82154471886.

68817445128 is a `hidden beast` number, since 6 + 8 + 81 + 7 + 44 + 512 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (68817445127) and next prime (68817445129).

It can be written as a sum of positive squares in only one way, i.e., 68318458884 + 498986244 = 261378^2 + 22338^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (68817445127) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 53099233 + ... + 53100528.

Almost surely, 2^68817445128 is an apocalyptic number.

It is an amenable number.

68817445128 is an abundant number, since it is smaller than the sum of its proper divisors (123935122902).

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

68817445128 is a wasteful number, since it uses less digits than its factorization.

68817445128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106199779 (or 106199766 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 68817445128 in words is "sixty-eight billion, eight hundred seventeen million, four hundred forty-five thousand, one hundred twenty-eight".