285779939465 has 4 divisors (see below), whose sum is σ = 342935927364. Its totient is φ = 228623951568.

The previous prime is 285779939449. The next prime is 285779939491. The reversal of 285779939465 is 564939977582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30447807049 + 255332132416 = 174493^2 + 505304^2 .

It is a cyclic number.

It is not a de Polignac number, because 285779939465 - 2⁴ = 285779939449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285779939392 and 285779939401.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 28577993942 + ... + 28577993951.

It is an arithmetic number, because the mean of its divisors is an integer number (85733981841).

Almost surely, 2^285779939465 is an apocalyptic number.

It is an amenable number.

285779939465 is a deficient number, since it is larger than the sum of its proper divisors (57155987899).

285779939465 is an equidigital number, since it uses as much as digits as its factorization.

285779939465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57155987898.

The product of its digits is 1028764800, while the sum is 74.

The spelling of 285779939465 in words is "two hundred eighty-five billion, seven hundred seventy-nine million, nine hundred thirty-nine thousand, four hundred sixty-five".