68140668140 has 12 divisors (see below), whose sum is σ = 143095403136. Its totient is φ = 27256267248.

The previous prime is 68140668097. The next prime is 68140668173. The reversal of 68140668140 is 4186604186.

68140668140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×68140668140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68140668091 and 68140668100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703516684 + ... + 1703516723.

It is an arithmetic number, because the mean of its divisors is an integer number (11924616928).

Almost surely, 2^68140668140 is an apocalyptic number.

It is an amenable number.

68140668140 is an abundant number, since it is smaller than the sum of its proper divisors (74954734996).

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

68140668140 is a wasteful number, since it uses less digits than its factorization.

68140668140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407033416 (or 3407033414 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 68140668140 in words is "sixty-eight billion, one hundred forty million, six hundred sixty-eight thousand, one hundred forty".