85864319461 has 2 divisors, whose sum is σ = 85864319462. Its totient is φ = 85864319460.

The previous prime is 85864319419. The next prime is 85864319521. The reversal of 85864319461 is 16491346858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56522685025 + 29341634436 = 237745^2 + 171294^2 .

It is a cyclic number.

It is not a de Polignac number, because 85864319461 - 2⁹ = 85864318949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85864319161) 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, 42932159730 + 42932159731.

It is an arithmetic number, because the mean of its divisors is an integer number (42932159731).

Almost surely, 2^85864319461 is an apocalyptic number.

It is an amenable number.

85864319461 is a deficient number, since it is larger than the sum of its proper divisors (1).

85864319461 is an equidigital number, since it uses as much as digits as its factorization.

85864319461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 55.

The spelling of 85864319461 in words is "eighty-five billion, eight hundred sixty-four million, three hundred nineteen thousand, four hundred sixty-one".