85807428462389 has 2 divisors, whose sum is σ = 85807428462390. Its totient is φ = 85807428462388.

The previous prime is 85807428462361. The next prime is 85807428462421. The reversal of 85807428462389 is 98326482470858.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83082915090289 + 2724513372100 = 9114983^2 + 1650610^2 .

It is a cyclic number.

It is not a de Polignac number, because 85807428462389 - 2³⁶ = 85738708985653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85807428462289) 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, 42903714231194 + 42903714231195.

It is an arithmetic number, because the mean of its divisors is an integer number (42903714231195).

Almost surely, 2^{85807428462389} is an apocalyptic number.

It is an amenable number.

85807428462389 is a deficient number, since it is larger than the sum of its proper divisors (1).

85807428462389 is an equidigital number, since it uses as much as digits as its factorization.

85807428462389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1486356480, while the sum is 74.

The spelling of 85807428462389 in words is "eighty-five trillion, eight hundred seven billion, four hundred twenty-eight million, four hundred sixty-two thousand, three hundred eighty-nine".