68843201536512 has 200 divisors, whose sum is σ = 221284895008716. Its totient is φ = 21182523383808.

The previous prime is 68843201536349. The next prime is 68843201536531. The reversal of 68843201536512 is 21563510234886.

68843201536512 is a `hidden beast` number, since 6 + 8 + 8 + 432 + 0 + 153 + 6 + 51 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53915302031616 + 14927899504896 = 7342704^2 + 3863664^2 .

It is a super-2 number, since 2×68843201536512² (a number of 28 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63306723 + ... + 64384994.

Almost surely, 2^{68843201536512} is an apocalyptic number.

It is an amenable number.

68843201536512 is an abundant number, since it is smaller than the sum of its proper divisors (152441693472204).

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

68843201536512 is a wasteful number, since it uses less digits than its factorization.

68843201536512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127691760 (or 127691735 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 68843201536512 in words is "sixty-eight trillion, eight hundred forty-three billion, two hundred one million, five hundred thirty-six thousand, five hundred twelve".