285644977349 has 2 divisors, whose sum is σ = 285644977350. Its totient is φ = 285644977348.

The previous prime is 285644977337. The next prime is 285644977369. The reversal of 285644977349 is 943779446582.

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., 217109402500 + 68535574849 = 465950^2 + 261793^2 .

It is a cyclic number.

It is not a de Polignac number, because 285644977349 - 2²⁴ = 285628200133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285644977369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142822488674 + 142822488675.

It is an arithmetic number, because the mean of its divisors is an integer number (142822488675).

Almost surely, 2^285644977349 is an apocalyptic number.

It is an amenable number.

285644977349 is a deficient number, since it is larger than the sum of its proper divisors (1).

285644977349 is an equidigital number, since it uses as much as digits as its factorization.

285644977349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 365783040, while the sum is 68.

The spelling of 285644977349 in words is "two hundred eighty-five billion, six hundred forty-four million, nine hundred seventy-seven thousand, three hundred forty-nine".