12947147585 has 16 divisors (see below), whose sum is σ = 16130394000. Its totient is φ = 9964421376.

The previous prime is 12947147569. The next prime is 12947147593. The reversal of 12947147585 is 58574174921.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 20367169 + 12926780416 = 4513^2 + 113696^2 .

It is a cyclic number.

It is not a de Polignac number, because 12947147585 - 2⁴ = 12947147569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121010 + ... + 201339.

It is an arithmetic number, because the mean of its divisors is an integer number (1008149625).

Almost surely, 2^12947147585 is an apocalyptic number.

It is an amenable number.

12947147585 is a deficient number, since it is larger than the sum of its proper divisors (3183246415).

12947147585 is a wasteful number, since it uses less digits than its factorization.

12947147585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322660.

The product of its digits is 2822400, while the sum is 53.

The spelling of 12947147585 in words is "twelve billion, nine hundred forty-seven million, one hundred forty-seven thousand, five hundred eighty-five".