12765382885 has 4 divisors (see below), whose sum is σ = 15318459468. Its totient is φ = 10212306304.

The previous prime is 12765382879. The next prime is 12765382891. The reversal of 12765382885 is 58828356721.

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

It is an interprime number because it is at equal distance from previous prime (12765382879) and next prime (12765382891).

It can be written as a sum of positive squares in 2 ways, for example, as 9618509476 + 3146873409 = 98074^2 + 56097^2 .

It is a cyclic number.

It is not a de Polignac number, because 12765382885 - 2⁵ = 12765382853 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, 1276538284 + ... + 1276538293.

It is an arithmetic number, because the mean of its divisors is an integer number (3829614867).

Almost surely, 2^12765382885 is an apocalyptic number.

It is an amenable number.

12765382885 is a deficient number, since it is larger than the sum of its proper divisors (2553076583).

12765382885 is an equidigital number, since it uses as much as digits as its factorization.

12765382885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553076582.

The product of its digits is 6451200, while the sum is 55.

The spelling of 12765382885 in words is "twelve billion, seven hundred sixty-five million, three hundred eighty-two thousand, eight hundred eighty-five".