68785487870 has 32 divisors (see below), whose sum is σ = 135189565920. Its totient is φ = 24990704640.

The previous prime is 68785487851. The next prime is 68785487909. The reversal of 68785487870 is 7878458786.

It is a self number, because there is not a number n which added to its sum of digits gives 68785487870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152747 + ... + 401126.

It is an arithmetic number, because the mean of its divisors is an integer number (4224673935).

Almost surely, 2^68785487870 is an apocalyptic number.

68785487870 is a deficient number, since it is larger than the sum of its proper divisors (66404078050).

68785487870 is a wasteful number, since it uses less digits than its factorization.

68785487870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555020.

The product of its (nonzero) digits is 168591360, while the sum is 68.

It can be divided in two parts, 68785 and 487870, that added together give a palindrome (556655).

The spelling of 68785487870 in words is "sixty-eight billion, seven hundred eighty-five million, four hundred eighty-seven thousand, eight hundred seventy".