68711785897 has 8 divisors (see below), whose sum is σ = 70442343720. Its totient is φ = 66983831040.

The previous prime is 68711785889. The next prime is 68711785921. The reversal of 68711785897 is 79858711786.

It can be written as a sum of positive squares in 4 ways, for example, as 2323625616 + 66388160281 = 48204^2 + 257659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68711785897 - 2³ = 68711785889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68711785837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 597228 + ... + 702925.

It is an arithmetic number, because the mean of its divisors is an integer number (8805292965).

Almost surely, 2^68711785897 is an apocalyptic number.

It is an amenable number.

68711785897 is a deficient number, since it is larger than the sum of its proper divisors (1730557823).

68711785897 is a wasteful number, since it uses less digits than its factorization.

68711785897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301483.

The product of its digits is 47416320, while the sum is 67.

The spelling of 68711785897 in words is "sixty-eight billion, seven hundred eleven million, seven hundred eighty-five thousand, eight hundred ninety-seven".