68982315885 has 36 divisors (see below), whose sum is σ = 139090878108. Its totient is φ = 31534771968.

The previous prime is 68982315881. The next prime is 68982315901. The reversal of 68982315885 is 58851328986.

It can be written as a sum of positive squares in 2 ways, for example, as 50612850729 + 18369465156 = 224973^2 + 135534^2 .

It is not a de Polignac number, because 68982315885 - 2² = 68982315881 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68982315881) 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 35 ways as a sum of consecutive naturals, for example, 15640044 + ... + 15644453.

It is an arithmetic number, because the mean of its divisors is an integer number (3863635503).

Almost surely, 2^68982315885 is an apocalyptic number.

It is an amenable number.

68982315885 is an abundant number, since it is smaller than the sum of its proper divisors (70108562223).

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

68982315885 is a wasteful number, since it uses less digits than its factorization.

68982315885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31284522 (or 31284512 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The spelling of 68982315885 in words is "sixty-eight billion, nine hundred eighty-two million, three hundred fifteen thousand, eight hundred eighty-five".