85868977841 has 2 divisors, whose sum is σ = 85868977842. Its totient is φ = 85868977840.

The previous prime is 85868977819. The next prime is 85868977849. The reversal of 85868977841 is 14877986858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77170617616 + 8698360225 = 277796^2 + 93265^2 .

It is a cyclic number.

It is not a de Polignac number, because 85868977841 - 2³⁰ = 84795236017 is a prime.

It is not a weakly prime, because it can be changed into another prime (85868977849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42934488920 + 42934488921.

It is an arithmetic number, because the mean of its divisors is an integer number (42934488921).

Almost surely, 2^85868977841 is an apocalyptic number.

It is an amenable number.

85868977841 is a deficient number, since it is larger than the sum of its proper divisors (1).

85868977841 is an equidigital number, since it uses as much as digits as its factorization.

85868977841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216760320, while the sum is 71.

The spelling of 85868977841 in words is "eighty-five billion, eight hundred sixty-eight million, nine hundred seventy-seven thousand, eight hundred forty-one".