68726950889 has 4 divisors (see below), whose sum is σ = 72769712724. Its totient is φ = 64684189056.

The previous prime is 68726950871. The next prime is 68726950939. The reversal of 68726950889 is 98805962786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25850208400 + 42876742489 = 160780^2 + 207067^2 .

It is a cyclic number.

It is not a de Polignac number, because 68726950889 - 2³⁶ = 7474153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68726950829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021380892 + ... + 2021380925.

It is an arithmetic number, because the mean of its divisors is an integer number (18192428181).

Almost surely, 2^68726950889 is an apocalyptic number.

It is an amenable number.

68726950889 is a deficient number, since it is larger than the sum of its proper divisors (4042761835).

68726950889 is a wasteful number, since it uses less digits than its factorization.

68726950889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042761834.

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 68726950889 in words is "sixty-eight billion, seven hundred twenty-six million, nine hundred fifty thousand, eight hundred eighty-nine".