285785099819 has 2 divisors, whose sum is σ = 285785099820. Its totient is φ = 285785099818.

The previous prime is 285785099801. The next prime is 285785099827. The reversal of 285785099819 is 918990587582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285785099819 - 2¹² = 285785095723 is a prime.

It is a super-2 number, since 2×285785099819² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (285785099839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142892549909 + 142892549910.

It is an arithmetic number, because the mean of its divisors is an integer number (142892549910).

Almost surely, 2^285785099819 is an apocalyptic number.

285785099819 is a deficient number, since it is larger than the sum of its proper divisors (1).

285785099819 is an equidigital number, since it uses as much as digits as its factorization.

285785099819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 71.

The spelling of 285785099819 in words is "two hundred eighty-five billion, seven hundred eighty-five million, ninety-nine thousand, eight hundred nineteen".