85168012993 has 16 divisors (see below), whose sum is σ = 100191335040. Its totient is φ = 70867719936.

The previous prime is 85168012949. The next prime is 85168012997. The reversal of 85168012993 is 39921086158.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85168012993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85168012993.

It is not an unprimeable number, because it can be changed into a prime (85168012997) 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, 256408 + ... + 485881.

It is an arithmetic number, because the mean of its divisors is an integer number (6261958440).

Almost surely, 2^85168012993 is an apocalyptic number.

It is an amenable number.

85168012993 is a deficient number, since it is larger than the sum of its proper divisors (15023322047).

85168012993 is a wasteful number, since it uses less digits than its factorization.

85168012993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742776.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 85168012993 in words is "eighty-five billion, one hundred sixty-eight million, twelve thousand, nine hundred ninety-three".