12865557219 has 16 divisors (see below), whose sum is σ = 17903219712. Its totient is φ = 8202604608.

The previous prime is 12865557217. The next prime is 12865557223. The reversal of 12865557219 is 91275556821.

It is not a de Polignac number, because 12865557219 - 2¹ = 12865557217 is a prime.

It is a super-2 number, since 2×12865557219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12865557217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448599 + ... + 476415.

It is an arithmetic number, because the mean of its divisors is an integer number (1118951232).

Almost surely, 2^12865557219 is an apocalyptic number.

12865557219 is a deficient number, since it is larger than the sum of its proper divisors (5037662493).

12865557219 is a wasteful number, since it uses less digits than its factorization.

12865557219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34546.

The product of its digits is 1512000, while the sum is 51.

The spelling of 12865557219 in words is "twelve billion, eight hundred sixty-five million, five hundred fifty-seven thousand, two hundred nineteen".