68016802897 has 4 divisors (see below), whose sum is σ = 68308720740. Its totient is φ = 67724885056.

The previous prime is 68016802883. The next prime is 68016802939. The reversal of 68016802897 is 79820861086.

68016802897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79820861086 = 2 ⋅39910430543.

It can be written as a sum of positive squares in 2 ways, for example, as 14567524416 + 53449278481 = 120696^2 + 231191^2 .

It is a cyclic number.

It is not a de Polignac number, because 68016802897 - 2¹⁹ = 68016278609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68016802297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145958572 + ... + 145959037.

It is an arithmetic number, because the mean of its divisors is an integer number (17077180185).

Almost surely, 2^68016802897 is an apocalyptic number.

It is an amenable number.

68016802897 is a deficient number, since it is larger than the sum of its proper divisors (291917843).

68016802897 is a wasteful number, since it uses less digits than its factorization.

68016802897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291917842.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 68016802897 in words is "sixty-eight billion, sixteen million, eight hundred two thousand, eight hundred ninety-seven".