68840681975 has 24 divisors (see below), whose sum is σ = 92742366192. Its totient is φ = 50386291200.

The previous prime is 68840681971. The next prime is 68840682007. The reversal of 68840681975 is 57918604886.

It is not a de Polignac number, because 68840681975 - 2² = 68840681971 is a prime.

It is a Duffinian number.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 900521 + ... + 973970.

It is an arithmetic number, because the mean of its divisors is an integer number (3864265258).

Almost surely, 2^68840681975 is an apocalyptic number.

68840681975 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68840681975 is a deficient number, since it is larger than the sum of its proper divisors (23901684217).

68840681975 is a wasteful number, since it uses less digits than its factorization.

68840681975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874627 (or 1874622 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 68840681975 in words is "sixty-eight billion, eight hundred forty million, six hundred eighty-one thousand, nine hundred seventy-five".