12564039419 has 4 divisors (see below), whose sum is σ = 12611811696. Its totient is φ = 12516267144.

The previous prime is 12564039407. The next prime is 12564039451. The reversal of 12564039419 is 91493046521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12564039419 is a prime.

It is a super-2 number, since 2×12564039419² (a number of 21 digits) contains 22 as substring.

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 12564039419.

It is not an unprimeable number, because it can be changed into a prime (12564039469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23885744 + ... + 23886269.

It is an arithmetic number, because the mean of its divisors is an integer number (3152952924).

Almost surely, 2^12564039419 is an apocalyptic number.

12564039419 is a deficient number, since it is larger than the sum of its proper divisors (47772277).

12564039419 is an equidigital number, since it uses as much as digits as its factorization.

12564039419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47772276.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 12564039419 in words is "twelve billion, five hundred sixty-four million, thirty-nine thousand, four hundred nineteen".