285243677405 has 4 divisors (see below), whose sum is σ = 342292412892. Its totient is φ = 228194941920.

The previous prime is 285243677359. The next prime is 285243677417. The reversal of 285243677405 is 504776342582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504776342582 = 2 ⋅252388171291.

It can be written as a sum of positive squares in 2 ways, for example, as 216168273721 + 69075403684 = 464939^2 + 262822^2 .

It is not a de Polignac number, because 285243677405 - 2⁸ = 285243677149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524367736 + ... + 28524367745.

It is an arithmetic number, because the mean of its divisors is an integer number (85573103223).

Almost surely, 2^285243677405 is an apocalyptic number.

It is an amenable number.

285243677405 is a deficient number, since it is larger than the sum of its proper divisors (57048735487).

285243677405 is an equidigital number, since it uses as much as digits as its factorization.

285243677405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57048735486.

The product of its (nonzero) digits is 11289600, while the sum is 53.

The spelling of 285243677405 in words is "two hundred eighty-five billion, two hundred forty-three million, six hundred seventy-seven thousand, four hundred five".