68840681970 has 64 divisors (see below), whose sum is σ = 170291600640. Its totient is φ = 17802220800.

The previous prime is 68840681963. The next prime is 68840681971. The reversal of 68840681970 is 7918604886.

It is a self number, because there is not a number n which added to its sum of digits gives 68840681970.

It is not an unprimeable number, because it can be changed into a prime (68840681971) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 134985 + ... + 394844.

It is an arithmetic number, because the mean of its divisors is an integer number (2660806260).

Almost surely, 2^68840681970 is an apocalyptic number.

68840681970 is an abundant number, since it is smaller than the sum of its proper divisors (101450918670).

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

68840681970 is a wasteful number, since it uses less digits than its factorization.

68840681970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529971.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 68840681970 in words is "sixty-eight billion, eight hundred forty million, six hundred eighty-one thousand, nine hundred seventy".