85143968137 has 2 divisors, whose sum is σ = 85143968138. Its totient is φ = 85143968136.

The previous prime is 85143968113. The next prime is 85143968227. The reversal of 85143968137 is 73186934158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70466887936 + 14677080201 = 265456^2 + 121149^2 .

It is a cyclic number.

It is not a de Polignac number, because 85143968137 - 2²⁷ = 85009750409 is a prime.

It is a super-2 number, since 2×85143968137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85143968537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42571984068 + 42571984069.

It is an arithmetic number, because the mean of its divisors is an integer number (42571984069).

Almost surely, 2^85143968137 is an apocalyptic number.

It is an amenable number.

85143968137 is a deficient number, since it is larger than the sum of its proper divisors (1).

85143968137 is an equidigital number, since it uses as much as digits as its factorization.

85143968137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 85143968137 in words is "eighty-five billion, one hundred forty-three million, nine hundred sixty-eight thousand, one hundred thirty-seven".