85804640268643 has 2 divisors, whose sum is σ = 85804640268644. Its totient is φ = 85804640268642.

The previous prime is 85804640268587. The next prime is 85804640268667. The reversal of 85804640268643 is 34686204640858.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85804640268643 is a prime.

It is a super-2 number, since 2×85804640268643² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85804640268673) 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 as a sum of consecutive naturals, namely, 42902320134321 + 42902320134322.

It is an arithmetic number, because the mean of its divisors is an integer number (42902320134322).

Almost surely, 2^{85804640268643} is an apocalyptic number.

85804640268643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85804640268643 is an equidigital number, since it uses as much as digits as its factorization.

85804640268643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 212336640, while the sum is 64.

The spelling of 85804640268643 in words is "eighty-five trillion, eight hundred four billion, six hundred forty million, two hundred sixty-eight thousand, six hundred forty-three".