68125864081 has 16 divisors (see below), whose sum is σ = 76161758400. Its totient is φ = 60398265600.

The previous prime is 68125864063. The next prime is 68125864099. The reversal of 68125864081 is 18046852186.

It is an interprime number because it is at equal distance from previous prime (68125864063) and next prime (68125864099).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68125864081 is a prime.

It is a super-2 number, since 2×68125864081² (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 (68125864981) 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 15 ways as a sum of consecutive naturals, for example, 1170805 + ... + 1227613.

It is an arithmetic number, because the mean of its divisors is an integer number (4760109900).

Almost surely, 2^68125864081 is an apocalyptic number.

It is an amenable number.

68125864081 is a deficient number, since it is larger than the sum of its proper divisors (8035894319).

68125864081 is a wasteful number, since it uses less digits than its factorization.

68125864081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59520.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 68125864081 in words is "sixty-eight billion, one hundred twenty-five million, eight hundred sixty-four thousand, eighty-one".