12850777565 has 8 divisors (see below), whose sum is σ = 15442935768. Its totient is φ = 10265953600.

The previous prime is 12850777519. The next prime is 12850777591. The reversal of 12850777565 is 56577705821.

It can be written as a sum of positive squares in 4 ways, for example, as 6415689604 + 6435087961 = 80098^2 + 80219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12850777565 - 2²⁰ = 12849728989 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 7 ways as a sum of consecutive naturals, for example, 1829702 + ... + 1836711.

It is an arithmetic number, because the mean of its divisors is an integer number (1930366971).

Almost surely, 2^12850777565 is an apocalyptic number.

It is an amenable number.

12850777565 is a deficient number, since it is larger than the sum of its proper divisors (2592158203).

12850777565 is an equidigital number, since it uses as much as digits as its factorization.

12850777565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667119.

The product of its (nonzero) digits is 4116000, while the sum is 53.

The spelling of 12850777565 in words is "twelve billion, eight hundred fifty million, seven hundred seventy-seven thousand, five hundred sixty-five".