285785099801 has 2 divisors, whose sum is σ = 285785099802. Its totient is φ = 285785099800.

The previous prime is 285785099713. The next prime is 285785099819. The reversal of 285785099801 is 108990587582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247157128201 + 38627971600 = 497149^2 + 196540^2 .

It is a cyclic number.

It is not a de Polignac number, because 285785099801 - 2²⁶ = 285717990937 is a prime.

It is not a weakly prime, because it can be changed into another prime (285785099851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142892549900 + 142892549901.

It is an arithmetic number, because the mean of its divisors is an integer number (142892549901).

Almost surely, 2^285785099801 is an apocalyptic number.

It is an amenable number.

285785099801 is a deficient number, since it is larger than the sum of its proper divisors (1).

285785099801 is an equidigital number, since it uses as much as digits as its factorization.

285785099801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 62.

The spelling of 285785099801 in words is "two hundred eighty-five billion, seven hundred eighty-five million, ninety-nine thousand, eight hundred one".