12815065147 has 4 divisors (see below), whose sum is σ = 13489542280. Its totient is φ = 12140588016.

The previous prime is 12815065127. The next prime is 12815065163. The reversal of 12815065147 is 74156051821.

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-12815065147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12815065127) 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, 337238538 + ... + 337238575.

It is an arithmetic number, because the mean of its divisors is an integer number (3372385570).

Almost surely, 2^12815065147 is an apocalyptic number.

12815065147 is a deficient number, since it is larger than the sum of its proper divisors (674477133).

12815065147 is an equidigital number, since it uses as much as digits as its factorization.

12815065147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674477132.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 12815065147 in words is "twelve billion, eight hundred fifteen million, sixty-five thousand, one hundred forty-seven".