68063933969 has 4 divisors (see below), whose sum is σ = 68065792740. Its totient is φ = 68062075200.

The previous prime is 68063933933. The next prime is 68063933999. The reversal of 68063933969 is 96933936086.

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 63409283344 + 4654650625 = 251812^2 + 68225^2 .

It is a cyclic number.

It is not a de Polignac number, because 68063933969 - 2²⁸ = 67795498513 is a prime.

It is a super-2 number, since 2×68063933969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68063933999) 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, 873332 + ... + 948069.

It is an arithmetic number, because the mean of its divisors is an integer number (17016448185).

Almost surely, 2^68063933969 is an apocalyptic number.

It is an amenable number.

68063933969 is a deficient number, since it is larger than the sum of its proper divisors (1858771).

68063933969 is a wasteful number, since it uses less digits than its factorization.

68063933969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858770.

The product of its (nonzero) digits is 34012224, while the sum is 62.

The spelling of 68063933969 in words is "sixty-eight billion, sixty-three million, nine hundred thirty-three thousand, nine hundred sixty-nine".