68051385806680 has 64 divisors (see below), whose sum is σ = 156041395344000. Its totient is φ = 26704805497344.

The previous prime is 68051385806647. The next prime is 68051385806681. The reversal of 68051385806680 is 8660858315086.

It is a super-2 number, since 2×68051385806680² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68051385806681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68087475 + ... + 69079714.

It is an arithmetic number, because the mean of its divisors is an integer number (2438146802250).

Almost surely, 2^{68051385806680} is an apocalyptic number.

It is an amenable number.

68051385806680 is an abundant number, since it is smaller than the sum of its proper divisors (87990009537320).

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

68051385806680 is a wasteful number, since it uses less digits than its factorization.

68051385806680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137167436 (or 137167432 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 64.

The spelling of 68051385806680 in words is "sixty-eight trillion, fifty-one billion, three hundred eighty-five million, eight hundred six thousand, six hundred eighty".