12887210857 has 8 divisors (see below), whose sum is σ = 12923326280. Its totient is φ = 12851118720.

The previous prime is 12887210851. The next prime is 12887210863. The reversal of 12887210857 is 75801278821.

It is an interprime number because it is at equal distance from previous prime (12887210851) and next prime (12887210863).

It can be written as a sum of positive squares in 4 ways, for example, as 5280056896 + 7607153961 = 72664^2 + 87219^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12887210857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12887210857.

It is not an unprimeable number, because it can be changed into a prime (12887210851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211007 + ... + 2216827.

It is an arithmetic number, because the mean of its divisors is an integer number (1615415785).

Almost surely, 2^12887210857 is an apocalyptic number.

It is an amenable number.

12887210857 is a deficient number, since it is larger than the sum of its proper divisors (36115423).

12887210857 is an equidigital number, since it uses as much as digits as its factorization.

12887210857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11643.

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 12887210857 in words is "twelve billion, eight hundred eighty-seven million, two hundred ten thousand, eight hundred fifty-seven".